Adjustable-height stool features a contoured polyurethane seat with a raised backside so you won\'t slide back. Seat features a fixed mechanism height adjustment without tilting function. Height ranges from 21-1/4" to 28-1/2". Chromed footring adjusts in height for a comfortable position. Shift easily from one worksurface to another with the 360-degree swivel and the casters on the five-star nylon base. Seat measures 18-1/2" x 13-1/2". Weight capacity is 250 lb. Stool meets or exceeds BIFMA standards.