EuroTool Magnesia Soldering Block 6" X 3" X 1.5" Ideal for jewelry and crafts that require solder, especially filigree work Non-asbestos fireproof material Withstand temperatures up to 2000 degrees Fahrenheit Fibrous so it is soft enough to pin objects on 6 inch by 3 inch by 1.5 inch; 3.7 ounces