PURPLE COWS-Craft Iron Gem Setting Kit. Leave your mark with the Encaustic Wax. This package contains gem setting tips in three sizes for place 12ss; 16ss; and 20ss crystals; 9-1/2mm and 5mm flat tips for various size gems and nailheads; and button tip to set clusters of hot fix embellishments. To be used with MELT Craft Iron. Imported.