Medium-soft bumper for the queensquare/patella hammer. It also happens to be just the right diameter to be an extra large bumper for the Rabiner-Babinski. Black polymer/rubber.

Available textures: extra soft, soft, medium-soft, medium, medium-tough. We only separated them into 5 levels because we had an afternoon to kill once; before that, these were all either in the "medium" or the "soft" box. Also available as a kit of all 5 for a discount.