Material: Food Grade Silicone Color: Gray Size(Inch): 3.8*1.42 Usage temperature: -40~230 Fahrenheit Shape: round Reasons why candles fail to demold 1. Do not use soybean wax alone, be sure to add an equal amount of beeswax, which can fix the shape. 2. To have sufficient cooling time, it can also be frozen and solidified in the refrigerator. 3. You can cut both sides of the mold to facilitate demoulding. Don't worry that we will not leak sideways after testing.