Vic Firth drum mutes are made of non-slip pure rubber for realistic action. This Prepak includes 10", 12", and 2 - 14" drum mutes; your choice of 20" or 22" bass drum mute; 2 cymbal mutes; and one hi-hat mute. The bass drum mute is made of dense foam and attaches to the bass drum with Velcro. The cymbal mutes fit 16"-18" and 18"-20" cymbals.