EVANS BD20GB4 [EQ4 Clear 20 / Bass Drum] [1ply, 10mil + 10mil ring] Jo-Ral The fine-grained sponge-like sheet provides

The fine-grained sponge-like sheet provides excellent absorbency and durability

"They're easy to install

A practice mute that provides a blowing feel similar to that of normal playing

They're also useful in situations where volume isn't required

which gently but firmly protects the instrument

EVANS BD20GB4 [EQ4 Clear 20 / Bass Drum] [1ply, 10mil + 10mil ring] Jo-Ral The fine-grained sponge-like sheet providesWe are a drum head manufacturer that produces highly uniform drum heads using innovative ideas and computer control. Finish: Clear Thickness: 10mil + 10mil ring Size: 20 inches It features a specially designed 10mil film, single ply, and an internal harmonic control ring with a width optimized for head sizes from 18 to 26. This gives you a balanced, clear bass drum sound without sacrificing bass.