Evans EMAD Coated White Bass Drum Head, 18 Inch 18" drum head made using a single ply of 10mil film Externally Mounted Adjustable Damping system allows the player to adjust attack and focus Very versatile head for all music genres; a true working drummer's choice Coated to deliver additional warmth, focus, and depth, plus a unique translucent appearance All Evans drum heads are designed, engineered and manufactured in the USA