24-Hour Task Chair with arms features a molded back with pronounced lumbar support, Adjust back height control easily when seated, Deep contours provide for ""built-in"" comfort, and foam padding in seat is extra durable for years of use, Arms adjust in height and width, Functions include pneumatic seat-height adjustment, back-height adjustment, 360-degree swivel, tilt, tilt tension and tilt lock, Task chair is certified by SCS to be in compliance with specific indoor air quality emission requirements, Meets or exceeds applicable ANSI/BIFMA standards, SKU: SPRCH29602