Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to build a metal melting furnace for casting [title] Determine the size of the furnace for your needs. [step] For casting a small item such as a hand print or other object weighing less than a few pounds, a 12 inch (30. 5 cm) burning chamber with a 1 quart volume crucible should work. [title] Choose materials that will withstand the flame temperature of your fuel.

Ending1: [step] Create a 6-quart crucible to remember for your liquid. [substeps] Some 1 quart volumes can withstand temperatures hotter than 150ºf (40ºc), while others do not. Ending2: [step] Start with smaller materials such as glass, metal, or wood. Once the furnace is built, be sure the materials should run hot and dry then, melt the items using pressure sparingly to ensure the materials can roll without pain. Ending3: [step] We are using charcoal here because it is readily available and inexpensive. It has a flame temperature (heat value) of about 2 , 300 ° f (1 , 260 ° c) with a forced air blower. Ending4: [step] If the temperature inside of the melting chamber is too high, your fuel may not be able to heat to the proper temperature. Otherwise, go for materials that will be able to cool down.

Answer format: ending1/ending2/ending3/ending4