Designed to help musicians perform in the ideal ergonomical position and reduce spinal stress and leg strain when playing long periods. Thick, comfortable, firm seat cushion can be adjusted in a snap to 9 height positions from 22.8'' to 31.5'' (58 to 80 cm). Backrest can be adjusted to multiple height and depth positions for maximum comfort. Convenient, non-slip, height adjustable footrest. Sturdy steel construction. Non-reflective, powder-coated black enamel finish. Ad removed when sold.