Elevating legrest models feature a notched, stainless steel ratchet bar to lock the legrests securely in place Durable, tig-welded frame with gray powder coat finish Swing-back arms with easy flip back arm release Dual axle hemi-height adjustable Smooth-Rollling solid flat-free latex tires Adjustable-height back; Comfortable nylon upholstery Arm style: swing back desk length; Leg styles available: detachable footrest and detachable elevating footrest Seat sizes come in: 16 x 16 , 18 x 16 and 20 x 18 300-lb weight capacity 34 LBS Optional accessories: O2 Holder (item MDS85181U), Anti-Fold Device (item MDS85196), IV Pole (MDS85183), Overhead Anti-Theft Device (item MDS85197A), O2/IV Combo (item MDS85190), Anti-Tip Device (item MDS85189WK4), Tinnerman Legrest Locks (item WCA806991)