EVANS Hydraulic snare batter heads give you the fat, deep, short sound pioneered by rock and roll drummers in the 1970s. Made with a thin layer of oil between two plies of 7 mil film (6.5mil & 7.5mil for Hydraulic Black), these frost coated heads not only suppress unwanted overtones, but are also famously easy to tune. Hydraulics have a defined attack, short sustain, and dark tonal character—plus extra warmth, focus, and depth, thanks to Evans frost coating. This coated drumhead also features Level 360 Technology and is available in red, blue, and black.