Seating Chairs by Mayline Contoured back and tractor style seat to help eliminate fatigue. Ratchet back height adjustment. Multi-Function – Three levers to modify angle of back relative to the seat, control tilt and forward tilt for keyboard intensive activities. Tilt is free float or locking within a fixed range. T-shaped arms are height adjustable and have comfortable impact resistant urethane arm rests. The Seat Height is 17 1/2″ at its lowest and 21 1/2″ at it s highest.