8" Hydraulic Glass. Comprised of an outer 7 mil ply and an inner 6.5 mil ply sandwiching a layer of oil, it has the wet sound that defined the ‘70s - again in vogue! A durable head, the HYDRAULIC SNARE has a short sustain that emphasizes the fundamental tone of your drum. A blanket cure for troublesome snare drums and reflective rooms, this Evans veteran is back in the high life.