Superior Quality PET Plastic: By crafting these clamshell molds from PET material, we ensured they are non- and environmentally sound. Capable of withstanding wax pour temperatures of up to 140 ° F (60 ° C), they 't interact with the wax or dye, thereby preserving the quality of the wax cubes. Exceptional Clamshell Design: Notably sturdy and , these mold containers feature a clamshell design that together tightly yet opens easily. They can withstand consistent use without degrading, providing a solution for your wax tart crafting needs. Adaptable Size for Various Wax Warmers: Each of our clamshell molds measures 5.51 x 2.9 x 1 inch. they are versatile enough to fit most wax melt warmers, proving to be quite advantageous for melting wax cubes. Perfect for Wax Melt Creations: Aimed at those who delight in crafting their own wax melt cubes or modifying existing candles for wax melters, our heart-shaped clamshell molds are a fundamental accessory for DIY wax melt enthusiasts.