Evans Hydraulic Blue Bass Drum Head, 22inPlease note, image is for illustration purposes only, bass drum pedal is not included.Evans blue 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.This drum head is not clear, it comes in a cool BLUE finish!For over 40 years, Evans has been a pioneer of drum head manufacturing and design. Known for innovative designs such as EMAD, EC2S, and the Hydraulic series, Evans drum heads are made in the USA in a state of the art manufacturing facility. Acquired in 1996 by D'Addario and Company, the global leader in m