Product description: The Gong Bass Drum, an original from TAMA, is considered by many drummers to be synonymous with the inventiveness and unique sound of Tama Drums. Inspired by Japanese Taiko drums, a 22" head is mounted on a 20" shell. The resulting powerful, bassy sound is more than impressive. The Gong Bass Drum consists of a 7mm thick Starclassic Maple shell and is equipped with Quick Lock Tom Brackets. The Gong Bass Drum can now be ordered in Allen available Starclassic Maple finishes or foils. Specifications: Size 20" x 14" Shell 8 layers of 7mm maple Heads 22" EVANS® G1 Clear Feature Quick-Lock Tom Brackets (US.PAT.NO.9269337).