Sold as 1 Each. Height- and width-adjustable arms with soft polyurethane pads. Seat size: 18-1/2' to 22'H x 20-7/8'W x 20-1/8'D. Manufacturer's limited five-year warranty. Height adjustable ratchet back for optimal lumbar support. Supports up to 250 lbs. Casters supplied with this chair are not suitable for all floor types. Five-star base with 2' hooded dual-wheel casters for easy mobility. Meets or exceeds ANSI/BIFMA standards. Manufacturer's limited five-year warranty. Overall dimensions: 37-3/4' to 41-1/4'H x 25-1/4' to 27-1/4'W x 26'D. Casters supplied with this chair are not suitable for all floor types.