Tempered Glass Floor Mat for Office Chair, 36" x 46" Heavy Duty Hard Office Chair Mat, for Carpeted or Hard Floor, with 4 Anti-Slip Pads, GreyBrand: Koonmi Color: Grey Features: Tempering Glass Mat: The glass office chair mat for carpets is made of 0. 15" thick high quality tempered glass, capable of withstanding over 1000 pounds of pressure, ensuring long lasting durability. The gray design makes it more resistant to dirt during use Protective Contour Design: The rounded corners and polished edges of the carpet chair mat prevent damage to both the carpet and floor. The included detachable