Task chair provides an ergonomic solution with many comfort features, including pneumatic seat-height adjustment, adjustable back height, 360-degree swivel, tilt, tilt tension, tilt lock and an asynchronous tilt control over seat and back, Seat size is 20-1/2"" wide x 18-1/2"" deep, Back measures 20"" wide x 24-1/2"" to 26-1/2"" high from seat, Included arms with urethane arm pads adjust in height and width, Distance between arms ranges from 18-1/8"" x 21-3/8"", Chair is upholstered with 100 percent polyester fabric, Black frame features a steel structure with polymer covering and five-star base with carpet casters, SKU: SPRCH28246