Bonham DRUMHEADS 22 inch EXD External Damping 2 ply Bass Drum Batter Head. External Damping system containing a foam muffle ring that can be removed if required depending on the sound requirements on the day . Bonham DRUMHEADS are a UK brand that are committed to supplying quality drum heads for the every day drummer that is maybe on a budget. please look at my other listing's for other Bonham drumheads. thanks for Looking Mickysticks