The Alvin American-Style Draftsman’s Chair is a ruggedly constructed traditional chair that offers both comfort and durability. Its features include pneumatic height control, a height and depth adjustable hinged backrest with polypropylene back shell, dual-wheel casters, and a 23" (58 cm) tubular chrome steel base with built-in foot ring. The seat cushion is made of long lasting, comfortable molded foam and is 18"W × 18"D (46 cm × 46 cm) and is 4" (10 cm) thick. The backrest is 15"W × 10"H (38 cm × 25 cm). The height adjusts from 23" to 31" (58 cm to 79 cm) high. The chair comes complete with a set of locking casters and non-slip foot glides. Minimal assembly required, with basic tools. All instructions are included.