Home Cal Clear Chair or table Mats for Hard Wood Floor Protection, Rectangular and Grinding,Multi-sizes (36''x47'') 1/16" Thickness High quality PVC material, transparent outlooking, do not hide the beauty of your floor or carpet Popular sizes designed to cater for the favors of most people or occations Lifetime warranty under standard use will not crack, curl, break, scratch or discolor Might not flat on the first use, put some weight help to make improvements Perfect for chair with or without casters on the hard floor