Your tom has got to be big and fat, and the Hydraulic heads from Evans deliver. The Hydraulic Black features 2 black-finished plies filled with a layer of oil, which acts as a muffler to increase your attack without messing up the feel of the head. The attack is very solid with a quick, controlled sustain that rules for rock, live or in the studio. *Note: Evans is in the process of updating their product packaging. Rest assured that while the packaging you receive may differ from what"s shown here, the same great Evans heads you rely on are still inside.2 - 6.5mil plies Black finished Oil filled Fat and wet sound Solid attack Controlled, quick sustain