An attractive yet simple stool that will fit well in either the office, shop or studio, this model features a firm 1" thick black polyurethane swivel seat that is 13?" in diameter. The pneumatic lift allows height adjustment from 17" - 25" and the 24" diameter steel-reinforced nylon base provides excellent stability and mobility. Accepts height extension kits CK38, CK49. Comes complete with a set of locking casters and a set of non-slip floor glides.