Evans Genera HD Snare heads feature two plies of film. An outer ply of 5mil film and an inner ply of 7.5mil film, in combination with a 2mil overtone control ring on the underside that "floats" with the head, eliminating excessive overtones and controlling sustain. Evans Level 360 technology is incorporated to extend the level playing surface of the drumhead, 360 degrees around the drum. • MFSKU S14R50 • UPC 019954503000