Pneumatic Stool w o Back Aluminum Base Doppler Transducers wheel frame) 38 1 2 (980 Undercast Padding wheel frame) 38 1 2 (980 mm) Height of chassis 6 (150 mm) Full size illuminated magnifier * 5 bifocal lens * Three diopter lens * Allows 13 of shadow free working areas * Includes fluorescent bulb and A bracket * Color: Oyster * 8 shade diameter load capacity under normal use Premium 23 die cast aluminum base with satin finish top * 5 leg design for greater stability * Full size diameter top and base for comfort and stability * 4 thick seat for extra comfort * Black hooded dual wheel nylon casters * Pneumatic height adjustment * All seats have 3 4 thick solid plywood base * Lever controls height * Knock down design saves on shipping * Easy no tools required assembly * Premium stain resistant woven knit backed vinyl upholstery * 250 lbs