Cleartex Glaciermat, Reinforced Glass Executive Chair Mat for Hard Floors/Carpets, 40" x 53" (FC124053EG) High-end chair mat made with crystal-clear reinforced glass Completely flat and unbendable mat with a perfectly smooth ergonomic rolling surface; super-strong and durable, suitable for a combined chair and user weight of up to 1000 pounds Reinforced glass chair mats won't sink, dent, buckle, curl at the edges or discolor; the rounded corners won't curl, scratch or catch flooring Unbeatable protection for home or office floors; Glaciermat glass chairmat comes with a 10 year limited warranty Suitable for all carpet types and hard floors - lays flat and stays flat; mat size may vary slightly due to manufacturing process Your chair will never sink into the Glaciermat glass chair mat. Glaciermat will never discolor, bend or curl. Our tempered glass chair mat is perfectly flat with a superior easy-glide surface. The Glaciermat glass chair mat wont slip or easily move about. Tempered glass makes Glaciermat the best chair mat for heavier users. The rounded corners give an elegant and safe finish, which won&#039;t damage flooring. Ultra-tough tempered glass makes Glaciermat our most durable chair mat yet. Glass chair mats mean perfect protection for hard floors and all carpet types. Glaciermat is available in two large sizes - 36&#034; x 48&#034; or 40&#034; x 53&#034;