This is a 4-Piece Prologix 12"/13"/14"/16" Drum Mute Set. Pro Logix drum mutes are designed of non-slip rubber topped with Pro Logix signature nylon material providing a great reduction in volume and a highly durable playing surface. These drum mutes are exceptional and will not disintegrate like other drum mutes on the market due to high-quality raw materials. Available in multiple sizes.