This high back multi-function drafting stool from OFM puts ergonomic comfort within your reach. This chair features a one touch seat depth adjustment (the seat can slide forward or backward to customize leg room), pneumatic seat height adjustment, backrest height adjustment, built in lumbar support in the backrest, adjustable seat pitch, seven position adjustable height armrests, height adjustable footrest, commercial grade, stain-resistant fabric upholstery and a heavy duty nylon base with standard dual wheel casters. Additional caster options available for a minimal charge. Dimensions: Seat size: 20"W x 20"D. Back size: 19"W x 21"H. This chair also comes with a cylinder extension that allows you to adjust the seat height from either 25"-29"H or 28"-32"H. Limited lifetime warranty from OFM. This high back drafting stool normally ships within 1-2 business days from our NC warehouse.