Dual Function Ergonomic Chair with Adjustable Back Height. Available in a variety of Fabric Grades. Fabric Padded Seat and Ratchet Back with Built-in Lumbar Support. One Touch Pneumatic Seat Height Adjustment. Dual Function Control. Heavy Duty Nylon Base with Dual Wheel Carpet Casters. Features: Dual Function Ergonomic Chair Adjustable Back Height Built-in Lumbar Support Pneumatic Seat Height Adjustment Custom Fabric Choice Specifications: Overall Product Dimensions: 44" H x 18.5" W x 23" DOffice Star