Evans EQ3 Resonant Frosted Bass Drum Head, 18 Inch 18" resonant drum head with a single ply of 6.5mil film A fixed, internal overtone control ring is made to be microphone friendly, 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