Evans ONYX Resonant Bass Drum Head, 22 Inch 22" resonant drum head made using a single ply of 7mil film coated with a frost matte coating A fixed, internal overtone control ring is made for every microphone situation, from the studio to arena The 5" offset mic port features a plastic sleeve focuses pitch and enhances the attach while providing protection for the port Available in a frosted, onyx, smooth white and coated white version All Evans drum heads are designed, engineered and manufactured in the USA