4 INGOT MOLD CRUCIBLE Made of clay bonded fused silica for melting temperatures up to 2800 degree F. (1538 degree C.) Excelent for melting gold and silver . Available as set of  four. The diameter sizes are: 1.75"( 44mm), 2.25"(57mm), 3"(76mm), 4"(100mm). The depth are: 5/8" (15.9mm), 3/4"(19.1mm), 1"(25.4 mm), 1.375"(34.9mm). The capacity are: 20 dwt ( 48 g), 40 dwt (96 g), 100 dwt ( 155 g), 175 dwt (420 g).

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