myGlassMat 48 x 60-Inch Tempered Glass Chair Mat for Carpet and Hard Floors, Rounded Corners, Smooth Polished Edges, 1/4-Inch Thick, Clear Glass (gcm48x60) Suitable for any floor type including high or low pile carpet, hardwood, marble, etc Durable tempered glass that can hold 1,000 lbs is smooth gliding, scratch resistant, anti-static and easily cleaned. *NEW* All mats come with clear adhesive rubber pads that may be applied if movement issues occur. Stunning rounded corners, smooth polished edges and perfect clarity to show off any floor. Transferable Lifetime Warranty by providing order number or purchaser. No special certificate needed.