SPACE Seating Deluxe AirGrid Back with Mesh Seat, Adjustable Footring, Pneumatic Seat Height Adjustment and Nylon Base Drafting Chair, Black Thick Padded Contour Mesh Seat and Back Built in Lumbar Support. Weight Capacity: Up to 250 pounds One Touch Pneumatic Seat Height Adjustment Nylon Base. Seat Size: 4 inches high x 19.5 inches wide x 20 inches deep, Back Size: 19 inches high x 20 inches wide Dual Wheel Carpet Casters