Evans BD20GB4C 20 inch EQ4 Bass Batter Coated 1-ply
Delivery by courier is £4.95 max for any number of drum heads.
Evans 20" frosted EQ4 single-ply bass head contains an internal overtone control ring with a removable muffle ring for optimal slap without sacrificing bottom end.
Evans EQ4 series features a special, single ply of 10mil film that provides durability and a woody attack that speaks live and in the studio.. The fixed internal ring is proportional to the head size, optimizing control from 18" to 26".