Quadtro Select Wheelchair Cushion 20 x 18 x 4.25 Roho Cushions Covers 25 1073 mm Legs Closed Jobst Ultrasheer 30 40 ThighHi 25 1073 mm Legs Closed External Width 27 Heavy duty vinyl with Permablok 3(R) bacterial protection * 1´ Firm density foam tops * Radiused seamless corners on upholstered components * Top sections have welded steel support frames * Pivoting joints house hardened steel shoulder bolts with locking nuts to ensure years of trouble free operation * Footswitch control * Power assisted caster system (unless noted otherwise) * 110 volts 60Hz motor (220 volts 50 Hz available on special order) * 500 lb * 3 year limited warranty