Great for making wax melts: These are great if you're trying to make your own wax melt or melt an existing candle to convert into your wax melter. Clamshells: They are very strong, , tightly closed, easy to separate and fairly easy to open. Products include: 40 packs of pentagram wax, 40 packs of Heart-shaped pack wax and 40 packs of round pack wax. They are sized perfectly for wax melts and are suitable for a wide range of wax melt heaters. Healthy and Environmentally Friendly PET Plastic: Made of PET material, it is healthy, non-, environmentally friendly, and tasteless. The wax casting temperature for these wax models is up to 130°F (55°C), it not interact with wax or dyes and affect the quality of the wax block. DIY Wax Melting Essentials: Great for making all types of wax cakes or soaps. There are 120 pieces in each set, don't worry about not enough, you can melt a lot of wax.