The Mapex T400 Drum Throne has a 12-inch diameter round seat, 2-inch thick foam pad, 6-position keyway rod with stop-nut locking mechanism and single braced tripod leg support. Features Include: Round Cushioned Seat 12" Diameter by 2.5" thick Durable Soft-Vinyl Seat Cover 6-Position Keyway Rod with Stop Lock Nut 17.3"-22" Height Range Single Braced Legs