Features: All metal parts chrome-plated steel or polished cast aluminum Designed and manufactured with strict attention to quality. This gives you seating that is durable, attractive and functions properly. It's seating you can depend on for long-lasting service. Easy-to-use height adjustment. No struggling to get the proper level. Simple pneumatic action makes this possible. Full 360&deg seat rotation regardless of height adjustment type Seat adjusts from 21 to 25? in height