Lynn Manufacturing Insulating Fire Brick Heat Insulation Block Low Thermal Con

Great insulator with low thermal conductivity and very low weight Easy to shape cut and carve with wood working tools Used for kilns forges furnaces knife making PMC metal clay firing jewelry casting or jewelry soldering block Specifications: 2300F rated weight 2.1lbs. 9x 4.5x 2.5 alumina silica refractory ceramic clay brick Well packed in bubble wrap to ensure delivery in good condition Insulating Fire Brick Heat Insulation Block Low Thermal Conducitity 2.5x 4.5x 9″ Pack of 12 2300F-Rated for Kilns Forges Furnances Soldering 3123T.