K4 Basic Lightweight Wheelchair Features Durable, tig-welded frame with gray powder coat finish Swing-back arms with easy flip back arm release Dual axle hemi-height adjustable; adjustable-height back Smooth-rolling solid flat-free latex tires 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 41 x 41 cm , 18 x 16 46 x 41 cm and 20 x 18 51 x 46 cm Weight capactiy on 16 and 18 models 300 lbs. 136 kg Weight capacity on 20 and 22 models 350 lbs. 158 kg 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 Picture is representative of this wheelchair line; please check specification table on each individual sku for specific product details Specifications MRI Compatible No PRODUCT TYPE K4 LightWeight, K4 Lightweight Extra Wide Whee WC Arm Style Swing Back Desk WC Chair Type Lightweight WC Leg Style Elevating, Swing Away WC Seat Depth 16 IN, 18 IN WC Seat Width 16 IN, 18 IN, 20 IN Weight Capacity 300 LB, 350 LB