Back by popular demand, the Hydraulic Red drum heads are back on the market after being discontinued over 10 years ago. Now even better than before, the Red Hydraulic heads feature Evans 360 technology making tuning easy and providing you with a true fit. The Hydraulic drum heads have been created with 1 ply of film, oil and sealed with another ply of film. The two ply, oil-sandwiched combination makes for an extremely durable head which produces a fat, deep, and short sound, first heard in popular 70's rock n roll music. Diameter: 13''. Finish: Red.