Elevating legrest models feature a notched, stainless steel ratchet bar to lock the legrests securely in place. Durable tig-welded frame in gray powder coat finish. Comfortable nylon upholstery. Smooth-rolling, solid flat-free tires. Dual axle hemi-height adjustable. Arm style: desk length removable. Leg style: detachable footrest. Seat size 18" w x 16" d (41 cm x 41 cm). 250-lb (113 kg) weight capacity. Optional accessories: O2 Holder (item MDS85181U), Anti-Fold Device (item MDS85196), I.V. Pole (MDS85183), Overhead Anti-Theft Device (item MDS85197A), O2/I.V. Combo (item MDS85190), Anti-Tip Device (item MDS85189), Tinnerman Legrest Locks (item WCA806991). This product contains dry natural rubber.