Both our chairs feature ergonomically contoured upholstery and backs adjustable for height and tilt. The Deluxe version offers a full syncro mechanism with seat tilt and improved comfort. The Wheely Stool has a comfortable 41cm diameter seat and an easy to use gas lift, whilst the Saddle Stool offers the very best in anatomically correct seating with the added benefit of tilting adjustment. Features: 1 year unconditional guarantee, fire retardant vinyl, 64cm 5 castor base for maximum stability, gas lift, full choice of colours to match your couch. Seat Diameter 410mm Overall Height 420 - 560mm Diameter of Base 630mm