Big & Tall Series chairs are designed to last. The Pivot Arm Executive Chair features a reinforced seating frame and oversized, heavy-duty cast aluminum components to remain solid and sturdy. Coupled with high density foam padding and a five-star aluminum base with dual hooded casters gives this heavy duty chair a 450 lb rating. The inflatable lumbar support is orthopedically designed to allow customized adjustments. Swivel seat has a pneumatic height adjustment. Pivot arms allow easy access. Upholstered in durable acrylic/poly blended burgundy fabric. Exceeds ANSI/BIFMA standards. Easy assembly.