Extended height chair offers a contoured waterfall seat & adjustable footring. Functions include pneumatic seat-height adjustment, posture mechanism / lock, back height adjustment & 360-degree swivel. Multiple adjustments assure the right fit. Chair holds up to 250 lb. Upholstered in 30 percent polyester & 70 percent Olefin. Seat size is 19-1/2" wide x 16" deep. Back size is 16" wide x 14" high. Extended height chair has 25" five-star base with dual hooded 2" casters. Chair meets or exceeds applicable ANSI / BIFMA standards. Available in black frame only. Arms are sold separately.