ProCare® Elbow Support, Large, 1 Each Low Air Loss Systems 5 in one inch increments Endoscopy 5 in one inch increments to allowing the user to choose the proper height * Installation is quick easy and tool free * A 20 wide by 29 long bed board slides between the mattress and box spring and the handle attaches to the bed board with snap buttons * The top of the handle is covered with skin friendly foam for a comfortable grip and increased safety * Fits any home style bed * Cushioned height adjustable handle * Easy to assemble no tools required * Weight capacity 250 pounds * measure around hips just three inches below waistline Large fits 12 to 14 inch forearm circumference Contact closure strap with D ring provides exact fit and adjustment