K4 Extra-Wide Lightweight Wheelchair Features Swing back arms with easy flip back arm release. Armrests and calf pads are upholstered and padded. Quick release axles allow tool-free removal of rear wheels. Dual axle hemi-height adjustable; Adjustable height back. Tough nylon upholstery. Arm styles available swing back desk length and swing back height adjustable desk length; Leg style detachable footrest and detachable elevating footrest. Seat sizes come in 20 x 18 51 cm x 46 cm and 22 x 18 56 cm x 41 cm . Optional accessories O2Holder item MDS85181U , Anti-Fold Device item MDS85196 , I.V. Pole MDS85183 , O2/I.V. Combo item MDS85190 , Anti-Tip Device item MDS85189WK4 , Seat Extension Kit for 18 wide only item WCA806922EXT ,Tinnerman Legrest Locks item WCA806991 . Specifications MRI Compatible No PRODUCT TYPE K4 Lightweight Extra Wide Whee, Lightweight Extra Wide Wheelch WC Arm Style Height Adj Swing Back Desk, Removable Full Length, Swing Back Desk WC Chair Type Bariatric Standard, Lightweight WC Leg Style Elevating, Swing Away WC Seat Depth 18 IN WC Seat Width 20 IN, 22 IN Weight Capacity 300 LB, 350 LB