K4 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. Available arm styles swing back desk length, swing back full length and swing back height adjustable desk length. Available leg styles detachable footrest and detachable elevating footrest. Comes in seat sizes 16 x 16 41 cm x 41 cm and 18 x 16 46 cm x 41 cm . 300-lb 136 kg weight capacity. Optional accessories O2 Holder 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 WC Arm Style Height Adj Swing Back Desk, Swing Back Desk, Swing Back Full WC Chair Type Lightweight, Standard WC Leg Style Elevating, Swing Away WC Seat Depth 16 IN WC Seat Width 16 IN, 18 IN Weight Capacity 300 LB