Boss Office Products High-Back Task Chair with Seat Slider: * High-back styling upholstered with commercial grade fabric * Sculptured waterfall seat made from molded foam that contours to the shape of your body * Ratchet back height adjustment allows perfect positioning of the back cushion for lumbar support * Adjustable height armrests with soft polyurethane * Width adjustable armrest allows the user to move the armrests to match shoulder width * Large 27" nylon base for greater stability * Hooded double wheel casters * Pneumatic gas lift seat height adjustment * Adjustable tilt tension control * Seat tilt lock allows the seat to lock throughout the tilt range * Back angle lock allows the back to lock throughout the angle range for perfect back support * Task upholstery and nylon base construction * 6-year warranty * Dimensions: 27"L x 30.5"W x 42"H