Multipurpose lab stool with back features long-wearing black vinyl upholstery and a generously cushioned 16" diameter seat that is 3-1/2" thick. Covered in antimicrobial treated vinyl. Stool holds 250 lb. Seat height adjusts pneumatically 5" from 17" to 22". Back height and depth adjust manually with control knob. Stool features a full 360-degree swivel seat, 2" hooded dual-wheel carpet casters and 23" diameter, polished aluminum five-star base. Meets or exceeds applicable ANSI/BIFMA standards.