Carbon steel frame with rust- and chip-resistant chrome plating. Armrests are upholstered and padded; MDS806450 models also come with upholstered and padded calf pads. Threaded seat screw inserts reduce stripping from upholstery change. Dual axle hemi-height adjustable. Chart pocket on back. Easy-to-clean vinyl upholstery. Seat size: 20" x 16" (51 cm x 41 cm); 300-lb (136 kg) weight capacity. Picture is representative of this wheelchair line; please check each individual sku for specific product details. Optional accessories: O2 Holder (item MDS85181U), Anti-Fold Device (item MDS85196), I.V. Pole (item MDS85183), Overhead Anti-Theft Device (item MDS85197A), O2/I.V. Combo (item MDS85190), Anti-Tip Device (item MDS85189), Tinnerman Legrest Locks (item WCA806991).