Evans Genera Resonant Drum Head, 12 Inch TT12GREvans TT12GR 12" Genera Resonant DrumheadEvans clear Genera Resonant drum heads produce a full, round sustain with strong upper mids that increase projection without sacrificing sustain. They are ideal for enhancing tone when combined with a 2 ply batter head. Evans Level 360 technology is incorporated to extend the level playing surface of the drumhead, 360 degrees around the drum. The vertically enhanced collar design guarantees even contact with