Regular bumper for the queensquare/patella hammer. Not hard enough to torture your patients, just harder by comparison to the lower texture grades. It also happens to be just the right diameter to be an extra large bumper for the Rabiner-Babinski. Black polymer/rubber.
Click here to get the forever-soft silicone queen square bumper for $6.00 each. They're the same bumpers that come standard on our queen square percussors. They also beat rubber mixes because they will not only never get hard, but they will never get sticky or physically bond to plastic if stored in a bag for an extended period of time either!
Click here to get the extra soft rubber-polymer mix queen square bumper for $4.00 each. Sorted by hand and still soft after years on the shelf, so it is what we say it is, and it will be for time to come.
This page is for the medium rubber-polymer mix queen square bumper for $2.00 each. That is only a relative comparison, however. While they are not soft and squishy, we've filtered out the nasty hard ones. We think you will find that they're still pain-free.