Imperial 32"x42" Slate Type 2 Thermal Stove/Wall Board Floor Protector. It is made with non-combustible materials and complies with ASTM E162 or ASTM E136. Allows you to install the stove closer to the wall. Mineral fiber screens covered with steel to provide excellent protection. Modular design for installing multiple screens. Can be used with the protective screen shim assembly to protect walls from heat by reducing the space between the heater and combustible materials by 67 % at a minimum distance of 12 inch Can also be used with other heaters such as kerosene and gas stoves and electric heaters. Steel with stone finish resists scratches. Use indoors only. UL and ULC certified for safety.