Lab stool features a screw lift and high base. Vinyl upholstery and a generously cushioned 3-1/2" thick seat provide comfortable, long-wearing seating. Vinyl is antimicrobial. Seat has a 16" diameter and swivels 360 degrees. Screw lift adjusts the seat height 8" from 25" to 33". Four-leg, 25" diameter base is made of tubular chrome-plated steel and has a footring and 2" hooded dual-wheel carpet casters. Stool holds 250 lb. and meets or exceeds applicable ANSI/BIFMA standards.