Our 505 Series Task Chairs are designed for multiple applications such as: nurses’ stations, computer terminals, offices and more. Seat height can be adjusted from 21 to 28 inches by a hand lever-released pneumatic cylinder Mounts on a 25 inch composite pedestal two inches wider than standard base for unmatched stability Large seat for superior comfort Backrest edges are protected from cuts, scrapes, and general wear with a vinyl bumper Footrest ring keeps occupant’s legs from dangling in the air Built with powder-coated steel frame for durability and corrosion resistanc