Evans EMAD System Pack, 22 Inch Includes 1 qty. 22" EMAD batter bass drum head made using a single ply of 10mil film Also includes 1 qty. 22" REMAD resonant drum head made using a single ply 7.5mil film This head combination has steadily become a consumer favorite and is available in a single box Offered at a reduced price compared to buying the heads individually All Evans drum heads are designed, engineered and manufactured in the USA