This stool has a one-piece Intercept suspension between outer composite polymer frames. The Kinematic Spine technology is integrated into the stool’s back frames to allow for varying recline positions and continuous support. The bumper edge detail runs along the perimeter of the seat/back of the Intercept suspension to help safeguard the suspension material from table edge impact. The silver alloy and graphite bases are aluminium with powder coat. The stool has a seat height range of 263 /8" to 341 /4" (77/8" of adjustment). The footrest is stationary and travels with the cylinder. Base is a 5-star base with glides, 2 1/2" caster, medium roll resistance with quiet roll technology, black yoke, suitable for hard floors or carpet Condition: almost perfect condition, intercept suspension seat and back are near perfect, very few signs of use only visible on very fine inspection, from all angles pristine. Age: 2 years, most of which not in use Material: flexible polypropylene kinematic spine, a durable aluminium silver alloy powder coated carbon base is, H-Alloy base, and breathable Intercept suspension mesh Origin: Berlin, Germany, designed by Studio 7.5, late 2000s design Dimensions (in cm): Height: 118cm–130.8cm, Width: 48.3cm, Depth: 62.7cm, Seat depth: 38.1cm, Seat height: 66.3cm–85.3cm Colours: intercept suspension seat and back and plastic frame in carbon, base in semi polished chrome