Commercial Grade Manufactured in the United States from domestically procured and inspected materials. Extra Heavy duty for years of use! 1 In. x 16 gauge zinc plated steel tubing will not rust, pit, peel or discolor. Automatic opening and folding, with 9 gauge Z hooked, zinc plated NO-SAG wire. Supra-Loop is the same patented suspension system used in upholstered furniture and automobile seating; it provides superior and long lasting support. Bed stands on our 4 In. ball-bearing hard composite tires for easy maneuverability. Furnished completely assembled and with 6 In. thick, 1.35 density poly foam mattress. The mattress cover is zippered, double sided, 8 gauge STAF-CHECK hospital grade green vinyl. The mattress cover is repairable before it is replaceable by using duct tape from the inside and comes complete with a full envelope zipper for easy repairs. Sizes: 30 In., 39 In., or 48 In. wide; all 72 In. long. STAF-CHECK is the same patented product used in hospital beds. A 400 pound weight limit is suggested. When folded, bed measures 50 In. high, 18 In. deep, width varies 30 In., 39 In. or 48 In. according to model.