Evans EQ3 RESONANT Coated Bass Drumhead With 5" Hole (White)EVANS EQ Resonant series features an offset 5" microphone port in a single ply of 6. 5mil film, plus a 10mil overtone control ring. This drumhead series is a very popular choice for both players and engineers. The coated surface provides more low register and attack. Features Made with a single ply of 6. 5mil film Microphone friendly, from the studio to arena The 5" offset mic port features a plastic sleeve that focuses pitch and enhances the attack