Multipurpose lab stool without back features long-wearing black antimicrobial treated vinyl covered upholstery with generously cushioned 16" diameter seat that is 3-1/2" thick. Seat height adjusts pneumatically 5" from 17" to 22". Lab stool features a full 360-degree swivel seat, 2" hooded dual-wheel carpet casters and 23" diameter, polished aluminum five-star base. Stool meets or exceeds applicable ANSI/BIFMA standards.