10 oz Crucible For Mini R9 R9D-10 Melting Casting Furnace Refining Gold Silver Copper Scrap Jewelry 10 oz R9 R9D-10 - Kwik Kiln Graphite Furnace Crucible Made from high density graphite 1.26" Outer Diameter X 2.16" Length Designed for R9 Furnaces and Kwik Kilns Graphite Crucibles will need to be replaced after prolonged use