Balt Up-Rite Pneumatic Height Adjustable Stool, 28.25" to 37.25" H x 24" W x 18.5" D, Black Get the versatility of Standing while relieving the stress associated with being on your feet. Built from rugged materials, stool is designed for long lasting performance in any environment, including industrial, educational, commercial, or medical. Self-skinned polyurethane Seat measures 13.3"W x 7"d. Pneumatically Height adjustable from 28.25" to 37.25" for individualized comfort.