Chinese Metrology accessories list

[PascalNE]

Hello everyone,
I've recently discovered the world of Chinese voltnuts and their products thanks to zlymex.
So I thought I'd make a list of all the products I've found that I think people might want and also any information about them.
I'm also planning on purchasing a lot of these things and testing them so that can all go here instead of making new topics 
Anybody who finds other products feel free to add them below. And I’ll try put them all on the main list.
Note: nearly all the products here are low thermal EMF even if I don't state it in the title
Note: all items are sold individually unless otherwise stated remember to leave a note if you want specific colours.
For more info on how to buy see fourth post.

Edit 31/08/2026 - Anything made by bbs.1ppm.cn (redtony) is currently unavailable check out this store for alternative lugs and some good binding posts (same as the ones I labelled Nimolv here) https://shop70023207.taobao.com/category.htm

Section 1: Binding posts

1. Pure passivated copper binding posts Currently sold out 12/06/2026
Price: 12¥/£1.25/$1.67US /€1.49
Link:https://www.goofish.com/item?id=711428863560&categoryId=125958001
Info: Passivated copper Low thermal EMF binding posts come in red and black
Availability: the seller says "The quantity is large, so you can buy it at will." I think they are actively being made
Seller: "bbs.1ppm.cn"  seems reputable and an active member on other metrology forums
Review: Great low cost low thermal EMF post. Item is well made with all copper or gold plated copper parts. My only complaint is a slightly small knob/"hat" although he does sell bigger versions here https://www.goofish.com/item?id=718161833064&categoryId=125958001 The copper parts have a shiny passivated copper finish and I have confirmed they are solid copper by filing down and all seems ok.
SpecificationsTo be added
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2. Gold plated pure copper binding posts
Price: 15¥/£1.56/$2.08US /€1.86
Link:https://www.goofish.com/item?id=674240096284&categoryId=125958001
Info: Gold plated copper Low thermal EMF binding posts come in red and black
Availability: the seller says "The quantity is large, so you can buy it at will." I think they are actively being made
Seller: "bbs.1ppm.cn"  seems reputable and an active member on other metrology forums
Review:Same as the above copper ones just with only gold plated parts.
SpecificationsLeakage: 59.9 Tohms or 1.67 pA at 100V(Source: https://www.eevblog.com/forum/metrology/bbs-1ppm-cn-binding-post/)
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3. Gold plated pure copper banana plug to binding post adapter for recessed inputs (like 34401etc)
Price: 17.5¥/£1.83/$2.43US /€2.17
Link:https://www.goofish.com/item?id=825071044095&categoryId=125958001
Info: Gold plated copper adapters basically giving binding posts to instruments like 34401a 7461a etc come in white and black
Availability: Seems they are actively being made
Seller: "bbs.1ppm.cn"  seems reputable and an active member on other metrology forums
Review:Good quality. All gold plated copper they come with larger glazed ceramic knobs as standard which I much prefer to the smaller plastic ones. In terms of the banana plug design they use the "slit" design this means they can lose a bit of tension with repeated insertions but it's very easy to remedy this just by opening them up with a screwdriver. I can confirm they added no extra thermal EMF in the 100nv range at least definitely a good pick for recessed inputs!
SpecificationsTo be added
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4. Raw pure copper binding posts (slightly more premium) SOLD OUT (as of 12/06/2026)
Price: 19.6¥/£2.04/$2.72US /€2.43
Link:https://www.goofish.com/item?id=720090510951
Info: Raw pure copper low thermal EMF binding posts look slightly more premium to me will have a full comparison later
Availability: unsure I think they are producing them since they seem to have a large volume but I have asked
Seller: "nimolv" seems like an average voltnut good reviews seems trustworthy
Review:A slightly more premium option than the bbs.1ppm.cn ones. Apparently they are passivated but it's a much less shiny finish and they definitely will oxidise easier but this can easily be fixed with some deoxit. They do have a bit more weight to them and feel a bit nicer to use with better tolerances and tighter threads the plastics are also slightly nicer. but functionally they will likely be the same.
SpecificationsTo be added
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6. Premium tellurium copper binding posts
Price: 20¥/£2.09/$2.78US /€2.48
Link:https://www.goofish.com/item?id=853045168073&categoryId=125958001
Info: Premium tellurium copper low thermal EMF binding posts come in green,blue,yellow,red,black
Availability: I assume quite large as the production certificate shows 10,000 units made
Seller:  "Qin Gong Xiao Jiang"  seems like another voltnut good reviews
Review:To be added planning to buy soon
Specifications material: American standard C14500 tellurium copper
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6.pure copper Pomona 3770 Clone
Price: 23¥/£2.56/$3.39US /€2.96
Link:https://item.taobao.com/item.htm?id=40823926055&skuId=61871554357
Info: Un-plated copper low thermal EMF binding posts similar to pomona 3770
Availability: Likely large
Seller:  "Red Leaf Idle Instrument"
Review:
Specifications
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7.TB3 tellurium copper binding posts backlit
Price: 130¥/£13.34/$18.07US /€15.91
Link:https://item.taobao.com/item.htm?id=706702482964
Info: Premium tellurium copper low thermal EMF binding posts in a variety of colours backlit gold plated or plain copper
Availability: Likely large
Seller:  "Dishuo technology intelligent instrument"
Review: https://www.eevblog.com/forum/metrology/low-thermal-e-m-f-binding-post-tbp3/50/
Specifications
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7.TB2 tellurium copper binding posts
Price: 56.5¥/£5.8/$7.78US /€6.85
Link:https://item.taobao.com/item.htm?id=595625345633&skuId=4133791420578
Info: Premium tellurium copper low thermal EMF binding posts in a variety of colours gold plated or plain copper
Availability: Likely large
Seller:  "Dishuo technology intelligent instrument"
Review: https://www.eevblog.com/forum/metrology/low-thermal-e-m-f-binding-post-tbp3/50/
Specifications
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[PascalNE]

Section 2: Connectors

1. 0.8mm/1mm thick  low thermal EMF pure copper spade connectors
Price: 0.75¥/£0.08/$0.1US /€0.09
Link:https://www.goofish.com/item?id=693464185718&categoryId=50025261
Info: 0.8mm/1mm thick copper low EMF  spade connectors
Availability: likely very large
Seller:"bbs.1ppm.cn"  seems reputable and an active member on other metrology forums
Review:Overall very good. Shiny passivated copper finish this finishing also seems to have hardened them a bit compared to un-passivated copper lugs. This makes them harder to crimp but much less likely to deform when used. In terms of thickness I found the 0.8mm ones to be preferable 1mm thick was just a bit too hard to crimp. (0.8mm lugs also have a lower thermal mass which is advantageous) In terms of material it was clear after cutting one in half it is solid copper all the way through no plating of any kind. I am yet to confirm the exact alloy but I see no reason to believe these aren't 99.9% electrical copper.
Specifications:To be added
Do I plan to stock? Yes, in large quantity.
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2. 0.8mm/1mm thick gold plated pure copper spade connectors
Price: 1.8¥/£0.18/$0.25US /€0.22
Link:https://www.goofish.com/item?id=690447052534&categoryId=50025261
Info: 0.8mm/1mm thick gold plated low thermal EMF spade connectors
Availability: likely very large
Seller:"bbs.1ppm.cn"  seems reputable and an active member on other metrology forums
Review:Well priced, good product. Nice gold plated finish. Other than the gold plating they are identical to the above copper ones.
Specifications:To be added
Do I plan to stock? Yes, in large quantity.
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3. Pure tellurium copper premium banana plugs
Price: 14.4¥/£1.5/$2US /€1.79
Link:https://www.goofish.com/item?id=861140653032&categoryId=125958001
Info:tellurium copper banana plugs low thermal EMF many colours for soldering to no screw crimping
Availability: likely very large has proper production certificate
Seller:"Qin Gong Xiao Jiang"  seems like another voltnut good reviews
Review:To be added planning to buy soon
Specifications:Material: American Standard C14500 Tellurium Copper 
Do I plan to stock? Need to review first.
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4. Pure tellurium copper premium panel mount banana plugs (ideal for shorting plugs etc)
Price: 28¥/£2.92/3.882US /€3.48
Link:https://www.goofish.com/item?id=845388930495&categoryId=126856418
Info:tellurium copper low thermal EMF banana plugs passivated finish
Availability: seem to be in active production
Seller: "Advance my china" serious voltnut and audio enthusiast very good reviews
Review: Not currently planning to purchase if anyone does please let me know and I'll add your review here
Specifications:(from listing not verified) -Plug body material: American standard C14500 tellurium copper
 -Hexagonal nut material: American standard C14500 tellurium copper
 -Spring material: American standard C17200 beryllium copper
 -Tail screw specification: suitable for M4.7*0.8
 -Loop contact potential: <22nV
Do I plan to stock? Need to be reviewed
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5. Pure tellurium copper premium spring type Low thermal EMF banana plugs
Price: 32¥/£3.34/$4.44US /€3.98
Link:https://www.goofish.com/item?id=905591500884&categoryId=125958001
Info:tellurium copper low thermal EMF banana plugs passivated finish
Availability: seem to be in active production
Seller: "Advance my china" serious voltnut and audio enthusiast very good reviews
Review: Not currently planning to purchase if anyone does please let me know and I'll add your review here
Specifications:(from listing not verified) -Plug body material: American standard C14500 tellurium copper
 -Spring material: American standard C17200 beryllium copper
 -Loop contact potential: <22nV
Do I plan to stock?  need to be reviewed
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[PascalNE]

Section 3: Miscellaneous


1. Premium 6mm pure copper passivated/gold plated 0 ohm short "harmonium"
Price: 28¥/£2.92/$3.89US /€3.48
Link:https://www.goofish.com/item?id=879512478352&categoryId=125952002
Info: 0 ohm short there is a choice of plating materials and 4 holes for mounting binding posts.
Availability: Seems to be actively produced
Seller:"bbs.1ppm.cn"  seems reputable and an active member on other metrology forums
Review:Nice quality well plated binding posts fit well. Totally zeros my ADCMT 7461A (6.5 digit DMM)
Specifications:To be added
Do I plan to stock? Yes in smaller quantities. 
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2. 4 wire shorting pcb for panel mount banana jacks"
Price: 5¥/£0.52/$0.69US /€0.62
Link:https://www.goofish.com/item?id=666983641334&categoryId=50023914
Info: simple 4 wire shorting PCB you can also buy a version with 10 boards
Availability: Seems to be actively produced
Seller:"Nangong Yuyu" seems pretty reputable sold other test equipment good reviews
Review:To be added planning to buy soon
Specifications:To be added
Do I plan to stock? Yes in medium quantities.
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[PascalNE]

As you can see these are all posted on a chinese only site called goofish (Xianyu) it seems to a bit like chinese Ebay and owned by the same people as taobao unfortunately it seems pretty much impossible to make an account if you don't live in china as you have to have the chinese version of the app.  So I'm using a site called Cssbuy It's basically a freight forwarder but they buy it for you (I'm sure other options are available this is not an ad) https://www.cssbuy.com/register?invite=cGFzY2FsbmUxMg==


Thanks for reading,
Pascal.

[zlymex]

Section 3: Miscellaneous


1. Premium 6mm pure copper passivated/gold plated 0 ohm short "harmonium"
Price: 28¥/£2.92/$3.89US /€3.48
Link:https://www.goofish.com/item?id=879512478352&categoryId=125952002
Info: 0 ohm short there is a choice of plating materials and 4 holes for mounting binding posts.
......

One thing noteworthy is that the 4 holes are M5 thread which ensure the uniform contact of the binding post with the plate and keep those 4 distances (19.05mm) precise.

[radiolistener]

Are you sure they are gold-plated? 
As far as I know, Chinese guys often mean something different when they say "gold-plated"

[PascalNE]

Obviously I won't know until I test them but the seller "bbs.1ppm.cn" says "Important note: the material is copper plated with gold, low thermoelectric coefficient. It is not pure copper plated with nitrogen oxide. The pure copper on Taobao generally refers to brass or white copper, and the yellow coating is generally titanium nitride. "
So I think that means they are actual gold not something else as they seem reputable. Also on the production certificate (which I know could be faked) it says gold plated.
But I will run a test when I get them. 

[TERRA Operative]

I would be interested in a bunch of both types of copper spade lugs.

Maybe a few sets of the copper banana plugs for fun too.

[PascalNE]

Yeah the banana posts are interesting I've never really seen any like that.

Also if anyone knows how to get in touch with "bbs.1ppm.cn"/"redtony" please let me know as try as I might I can't make a Xianyu account. And I want to get in contact directly if I make any large orders.

[zlymex]

Are you sure they are gold-plated? 
As far as I know, Chinese guys often mean something different when they say "gold-plated"

AFAIK items from bbs.1ppm.cn/Redtony are all gold-palated if he says so. However the thickness is now all about 2uIn that mentioned in the one of the spade connectors.  He once made spade connectors with 80u plating but is too expensive.

[PascalNE]

I don’t want to derail my own topic. But is there an accepted method for keeping copper binding posts/ connectors free of oxidation? How often does it need to be done in a normal environment?

[zlymex]

I don’t want to derail my own topic. But is there an accepted method for keeping copper binding posts/ connectors free of oxidation? How often does it need to be done in a normal environment?

HP suggested to use DeoxIT for 34420 copper connectors:
To help prevent the formation of oxides on the connector contacts, keep
the connector engaged whenever possible. After extended periods of time,
it may be necessary to treat the connector contacts. The recommended
treatment uses DeoxIT

[huangbin562]

https://www.goofish.com/item?spm=a21ybx.search.searchFeedList.1.170b6936tmkX2E&id=845388930495&categoryId=126856418

[huangbin562]

This is it. It's the best one. I can buy it.

[PascalNE]

Added a couple new items and some specs Note that the specs are from the listing so not yet verified ,I can't purchase all the items but the ones I can I'll add my own and if anyone else does I'll add your results.
Also this https://www.goofish.com/personal?userId=3456951312  seller is selling some cool datron calibrators if anyone is feeling brave  probably not worth the shipping though....

[PascalNE]

Added all the images 

[TERRA Operative]

Those panel mount banana plugs look nice too, would be great for making 4-wire standard resistors etc to plug directly into the meter.

[zlymex]

...
Also this https://www.goofish.com/personal?userId=3456951312  seller is selling some cool datron calibrators if anyone is feeling brave  probably not worth the shipping though....

He is a famous equipment collector and most of the items listed are not real price.

[PascalNE]

Yes I don’t think I looked at the prices properly I wonder what the true prices are. Are things any cheaper in China in terms of equipment? Or is it about the same being a global market.

[zlymex]

Yes I don’t think I looked at the prices properly I wonder what the true prices are. Are things any cheaper in China in terms of equipment? Or is it about the same being a global market.

In general, prices for used equipment are higher in China than on eBay. This is particularly true for voltnut equipment because sources are rare and # of voltnuts is increasing. There are many who buy from eBay and resell in goofish.
 

[PascalNE]

Added a couple items including a 4 wire short (would go great with those panel mount jacks) and those Aliexpress banana jacks.

and as always if anyone has any more products they've used lmk they don't have to be on goofish.

[Kean]

It looks like Superbuy allows for purchases and reshipping of items from goofish.

I've used Superbuy to purchase from Taobao, but this recent discussion is the first time I've heard of goofish.

As a test, I just tried that URL for the 0-ohm short:

https://www.superbuy.com/en/page/buy/?nTag=Home-search&from=search-input&url=https%3A%2F%2Fwww.goofish.com%2Fitem%3Fid%3D879512478352%26categoryId%3D125952002

[PascalNE]

I think I'm going to  go ahead with opening a small shop in July when I have more time I've been in contact with redtony (bbs.1ppm.cn) and he's let me know he's working on a next generation binding post so I can relay any feedback to him. (also talked about our instruments of course voltnuts really are the same everywhere  )
If you can't wait for that I have helped another forum member order from him directly and sort out all the shipping and stuff if you're interested in this send me a PM
My CSSbuy order has finally left their warehouse although I regret it as I've ended up paying a lot! So direct probably is the way to go.

[Kean]

I had USD $30 sitting in my Superbuy account, so I ordered a couple of the 0-ohm shorts, some banana jacks, and some fork terminals.
It turned out the extra fees pushed it a bit over $30... and I had to send some extra funds to Superbuy.  I guess I would have had to anyway for the shipping to AU.

I'm not doing 8.5d stuff, so this is all significant overkill and of no real benefit.  Of course I went gold plated because it is important for them to stay shiny.
My best meters right now are 6.5d 34465A & 34972A, so I won't really be able to make use of or verify them.  I guess I have that old Prema 6047 from Dave as well...

[PascalNE]

Which binding posts did you go for? I’ve got the Nimolv and redtony ones on order