HYTECH 2500F High Temperature Insulating Fire Bricks - 1.5" x 4.5" x 9" Soft Fireproof Bricks for Forge, Kiln, Wood Stove, Fireplace & Fire Pit - Heat Resistant Refractory Bricks (Pack of 10) - Perfect for DIY Metalworking, Blacksmithing & Outdoor Heating Projects