The PP238 set of four practice pads from Percussion Plus is an essential for any late-night drummer.The silencers are made from durable rubber and simply sit on top of your existing drums.They reduce the sound by up to 90%, an ideal solution for those times when you need to practice without disturbing the neighbours!They reduce the sound by up to 90%, an ideal solution for those times when you need to practice without disturbing the neighbours! Each pack contains: 2″ x 14″ 1″ x 10” 1″ x 12”