Task chair offers a sculpted, molded back with integral lumbar support. Waterfall seat front provides comfortable under-thigh support. Functions include pneumatic seat-height adjustment, adjustable back height, seat-depth adjustment and 360-degree swivel. Five-star base includes 2" hooded dual-wheel casters. Arms for chair are sold separately. Chair is certified by SCS to be in compliance with specific indoor air quality emission requirements. Meets or exceeds applicable ANSI/BIFMA standards.