Pneumatic adjustment provides easy-touch height adjustment on this stool with plastic base by Drive Medical. The revolving 14 round seat is padded with 4 of comfortable thick black padding. It leads to a solid steel shaft and standard composite plastic base that doesn't skimp on strength and security, as evident in the 250 pound weight capacity. Of course, 5 casters allow easy mobility around the room. The product is protected by a limited lifetime warranty.FeaturesStandard plastic base. Pneumatic adjustment provides easy-touch height adjustment. Solid steel shaft. 14 diameter round seat. 4 thick padded seat black . Black, composite base. 5 Casters. 250 lb. Weight Capacity. Limited Lifetime Warranty. 1 Each / Case