Ferris® File-a-Wax Carving Waxes, used for making models to be reproduced by the lost wax casting process. They can be sawed, filed or carved. Will stand rough handling and will not soften in your hands. Green wax cannot be flexed. Purple has some flexibility. Blue wax will bend 90° in 1/8" thickness. Approximate melting temperature is 240°F (116°C).