Evans 14" black Hydraulic two-ply drum head features a thin film of oil between the plies that suppresses unwanted overtones. A classic sound, short in sustain. Tension it tight for a real thump or loose for a more slappy sound. Evans Hydraulic series features two plies of thin film offering maximum durability, a fat, deep and short sound pioneered by early 70's rock and roll. Hydraulics are famously easy to tune...making them a perfect fix for troublesome drums and younger players looking for instant sound. 14" drum head with a thin layer of oil between two plies of film to suppress unwanted overtones Two plies offer consistency and durability for longer playing time A fat, deep and short sound pioneered by early 70's rock and roll Also available in a blue and a glass (clear) version All Evans drum heads are designed, engineered and manufactured in the USA