The design is an award-winning classic of elegant line, advanced ergonomics and hand-finished craftsmanship. The Sapper chair is the perfect balance of legendary design and ergonomic comfort, reflecting the corporate images of the most distinguished firms. Sapper’s sleek, one-piece shell is fitted with the ultimate in ergonomic features, including adjustable lumbar support, forward tilt, sling suspension mechanism for resiliency and generous seat pan for freedom of movement. Available also as a guest chair. Overall Dimensions: W 26 1/4", D 28 3/4", H 40 3/8", Seat Height 17 5/8" to 21 1/8". See Knoll website for seating options. GREENGUARD Certification.