Lightweight, soft insulating Fire Bricks are great for soldering applications. The fire brick allows you to solder more quickly and efficiently because you can concentrate the heat where you want it. Bricks can also be used for lining a smelting furnace or kiln and can withstand temperatures up to 2300 Degrees Fahrenheit. Made from a soft fire proof material that be easily carved, shaped and pinned. Dimensions: 9" x 4.5" x 2.5".