MMasters Portable Propane Forge, 2-Burner 2600��F Blacksmithing Forge for Knife Making, Metalworking, Horseshoe Forging, Gas Welding Kit Removable Door: The propane forge features a removable door on one side. When closed, it enhances thermal efficiency, and when removed, it provides more space for larger workpieces High-Temperature Coating: The entire propane forge is coated with high-temperature resistant paint, ensuring that it remains intact and does not deform or fall off even during extended high-temperature operations, offering excellent durability Premium Insulation and Heat Retention: The propane forge features 1-inch insulation material and refractory bricks inside, providing double protection and enhancing the durability and heat retention of the forge Multiple Size Options: All three sizes of the forge come with the same accessories. You can choose the size that suits your needs. This particular forge is a single-burner model with internal dimensions of 12.9 x 5.1 x 6.3 inches