Product Information: Get greater focus on tonal response with the combination of a fixed 10mil internal overtone ring and the 10mil single ply of film with EVANS Clear EQ4 drumhead. Product Features: 28″ drum head made using a special, single ply 10mil film Features a 10mil internal overtone control ring that helps focus the tonal response of the drum Very versatile head for all music genres; a true working drummer’s choice For more information and specifications, please refer to the manufacturers website