DetailsNatural Pack of Five Pure Soy Wax Tarts, sometimes referred to as "Melts" (15 grams minimum each) May be used in place of water in an aromatherapy essential oil burner so that "topping up" of the water can become a thing of the past . Can be melted in our new electric wax melt warmers. Electric Wax Warmers No added scent of any kind, ready for your taste of pure essential oil or unique signature oil blend. Wax tart will melt at 55 degrees Celsius and harden after the burner candle is extinguished to form a hardened wax block that will easily slip out of the bowl for ease of cleaning and ready for the addition of another of your favourite scented wax tarts. Any soy wax residue or spillage can be washed out as it is water soluble. Soy wax is so completely safe that it can even be eaten or cooked with! Natural plant product unlike paraffin wax.