500g Ceramic Crucible Torch Melting Gold Silver Kit Set Anhydrous Casting Flux Tongs Stir Rod 15A Works with gold, brass, silver, copper, aluminum, and more The ceramic silica crucible can withstand temperatures up to 2500F (1371C) This kit also includes a 4 ounce package of anhydrous borax casting flux, plus a pair of large whip tongs that will securely hold your crucible while your pour and cast your molten metals, along with a 5/16" diameter x 12" long graphite stir rod