Ergonomic Work Stand, without arms, vinyl is bonded to 2" thick padded waterfall contour seat, tilt control knob allows 14"W x 10"D seat to rock or it can be locked, 21"-31" pneumatic height adjustable, 5 prong 24" molded base - Nexel's industrial and food service storage and handling equipment is designed for heavy duty commercial use. They produce an extensive line of shelving, racks, bins, displays, and other solutions for storage, transport, and commercial displays. Their products are used extensively in restaurants, bars, schools, hospitals, retail outlets and anywhere else sturd &, sanitary storage and transport of items is needed. Image may differ based on configuration.