Fulfillment by Amazon (FBA) is a service we offer sellers that lets them store their products in Amazon's fulfillment centers, and we directly pack, ship, and provide customer service for these products. Something we hope you'll especially enjoy: FBA items qualify for FREE Shipping and Amazon Prime.If you're a seller, Fulfillment by Amazon can help you grow your business. Learn more about the program. Built-in lumbar support and a waterfall seat design reduce stress to your legs by increasing circulation. The durable 5-star nylon base in a solid 27-inch diameter has full swivel and hooded double wheel casters which allow for smooth movement and added stability. User's Choice - No Arm Option User's Choice - Adjustable Arm Option User's Choice - Loop Arm Option Keep employees productive with the Boss Drafting Stool B1615-BK with 20" chrome foot ring. The pneumatic gas lift seat-height adjustment lets users alter the height of the stool from 26.5 to 31.5". The ergonomically contoured seat, which is 17.5" W x 16.5" D, and back are upholstered in tweed fabric to withstand daily use, and the black 27" nylon base in a five-star format adds stability to the stool. Move the stool easily on hooded double-wheel casters. Weight capacity is 275 pounds and the overall size is 17.5" W x 25" D x 44.5 to 49.5" H.