This is may be a bit unfair, but this piece didn't work with either of my upright basses, so make sure you can use it before you buy it.
I have an older upright from the 30's and it has a small bulge at the tip of the endpin. This bulge made it impossible to put the rubber piece properly in place. instead, it bent and broke.
The other bass is a cheap chinese made plywood bass, and after on gig outdoors, the rubber piece was stuck in the ground and remained there when I moved the bass... so no, this was not for me.
