8" Silent Trim Designed specifically to get rid of that annoying rim click when your stick hits the drum hoop. Added benefit is that it also prevents your drum sticks from getting torn up as fast, since they aren't being damaged when they hit the hoop, that is if you have the SilenTrim installed. SilenTrim Features: Molded from standard acoustic drum hoops for perfect fit Made of heavy-duty 45 durometer rubber No adhesives necessary for installation No tools for installation or removal American Made by Pintech