Hello there
I have all of these termination types.je, mostly the Tektronix, EGG, and HP.
The Chinese knockoffs are poor quality mechanical in the connectors.
I very highly recommend the Mini-circuits parts for terms or attenuators
Very nice service on small orders.
Paid $10-15 each.
VERY well specified and VSWR ~ 1.2 up to 1-2 GHz
Just the ramblings of an old retired EE !
Jon