Safco's Industrial Series chairs feature a 5-leg, 26" diameter tubular steel base with 2 1/2" high-impact nylon glides for safety and stability. Seats and backs are contoured to promote good posture and covered with black microcellular, self-skinning polyurethane foam for comfort. This product meets or exceeds ANSI / BIFMA standards Features: -Provides 8" of pneumatic lift -Paddle lever controls 22 degrees of backrest tilt -Ergo knob controls 5" backrest height adjustment -Design enables workers of any size to adjust height in minutes -Includes high and low-rung polypropylene footrests, which mount securely to base -360 degrees of swivel -Meets or exceeds ANSI/BIFMA standards -Easy assembly Specifications: -Seat Dimensions: 18 1/2" W x 17" D -Seat Cushion Depth: 2 1/2" -Seat Height Range: 17" - 35" -Back Dimensions: 14 1/2" W x 9" H -Overall Dimensions: 26" Dia. x 34" - 52" H Click Here to View Safco's Limited Lifetime Warranty