Kuyal Clear Chair mat for Hard Floors 75 x 120 cm (2.5' x 4') Transparent Floor Mats Wood/Tile Protection Mat for Office & HomeSpecialized DesignedDesigned for HARD FLOOR surfaces only. No gripper. Thickness: 0. 08" thicker, anti slide coating on the underside which is designed to keep them firmly in place while in use. The tough side of chair mats is up and the smooth side is down. Best ProtectionEffectively helps to prevent damage to hard flooring caused by your office chair casters or wheels. Under standard use will not crack, curl, break, scratch or discolor.