Six year limited warranty. - See below the High Back Version - Features: Boss B756 Beautifully upholstered with Black LeatherPlus. Dacron Filled Cushions. Ratchet back height adjustment mechanism which allows perfect position of the back cushion and lumbar support. Adjustable tilt tension control. Adjustable seat and back angle. Adjustable height armrests with soft polyurethane pad. Large 27" nylon base for greater stability. Hooded double wheel casters. Upright locking position. Pneumatic gas lift seat height adjustment. Optional seat slider upgrade available. High back: Model No. B750SS Mid Back: Model No. B756SS Arm Height: 24.5-30.5"H. Seat Size: 21"W x 19"D. Seat Height: 19"-22.5". Overall Dimensions: 30.5"W x 27"D x 40.5--45.5"H.