The Roc-N-Soc Nitro Throne is a compact seat with a built-in nitrogen gas shock absorber. This feature adds to its other comforts for a drummer who may desire a little bounce. Heavy bracing. Bicycle design reduces leg fatigue. 18" to 24" seat height.Nitrogen gas shock absorber for comfort and added bounce 18" to 24" seat height Bicycle design for reduced leg fatigue