Evans clear EQ3 series features two plies of 6.5mil film and provides a controlled low-end rumble and focused attack. Its articulation and endurance make the EQ3 especially suitable for live playing and will not distort under heavy hitting. An internal overtone control ring with a removable muffle ring make for extreme articulation and ultimate endurance. Evans EQ3 series features two plies of 6.5mil film and provides a controlled low-end rumble and focused attack. Its articulation and endurance make the EQ3 especially suitable for live playing and will not distort under heavy hitting., 20" bass drum head made using two plies of 6.5mil film, An internal overtone control ring and a removable muffle ring coupled with dry-vents work extremely well with and without a microphone, Very versatile head for all music genres; a true working drummer's choice, Also available in a frosted version, All Evans drum heads are designed, engineered and manufactured in the USA