Pro Advantage Premium-Plus 5 Leg Pneumatic Stool w/comfortable contour seamless upholstered seat & depth Adjustable Backrest is designed with Contemporary styled, color coordinated bases and backrest shrouds in Natural Sand and a premium die cast satin finished cast aluminum base with hooded, nylon dual-wheel casters. The stool features a 5-leg design for greater stability and fast, pneumatic height adjustment with a large, easy to locate D-shaped height lever. The Pneumatic lever is field changeable from left hand to right. The 4 thick round seat contains a firm, polyfoam padding for extra comfort and is covered in premium, stain-resistant, woven, knit-backed, vinyl upholstery.