Multipurpose lab stool without back features long-wearing, black vinyl upholstery and a generously cushioned 13-1/2" diameter seat. Seat height adjusts pneumatically 5" from 16" to 21". Lab stool features a full 360-degree swivel seat, 2" swivel casters and 18" diameter, polished aluminum five-star base. Weight capacity is 250 lb. Stool meets or exceeds applicable ANSI/BIFMA standards.