Evans ES TTHG DrumHead 20 in.

Evans Hydraulic Clear Tom Heads An alternative Developed as an alternative to uneven and inconsistent methods of internal and external drumhead muffling, Hydraulic heads have a dark, controlled tone coupled with good stick response and excellent durability; making them suitable for many studio recording and closely mic'd live playing situations.

Another Evans exclusive, Hydraulic heads are heavy-duty, twin-ply drumheads that have an oil-filling between the two plies to greatly reduce drum resonance and, at the same time, emphasize the fundamental and lower overtones of the drum