Lab/task stool features a polymer shell and an adjustable-height footring for comfortable seating in labs, schools or other work areas with high countertops. Stool has 7/16" solid steel, rod frame, but no arms. Functions include pneumatic seat-height adjustment and 360-degree swivel. Five-star base includes black-hooded 2" dual-wheel casters. Footring adjusts from 7-1/8" high to 12-3/4" high. Seat adjusts from 20-3/8" high to 30-1/2" high. Stool is certified by SCS to be in compliance with specific indoor air quality emission requirements and meets or exceeds applicable ANSI/BIFMA standards.