Rycote Invision INV-6

I purchased two of these for matched pairs of Sennheiser 8040s and 8020s. Research showed that they were recommended as being more effective at inhibiting structure-borne rumble than Sennheiser's own overpriced MZS 8000 mount.
These are made from the same high-quality and non-brittle plastic that Rycote uses in all their products. I expect this to last.
If the brass fitment (5/8" fitting) is removed the mount will attach to the non-US standard 3/8" fitting.
The mount incorporates a clip for holding the cable which may prevent cable-borne vibrations causing interference.
The clips hold the 8020s/8040s securely, they are faced with rubber to grip and prevent scratching, but it is a bit of a struggle to get these mics in in the first place.