If used incorrectly, vivarium heat mats can be dangerous and pose the risk of fire. The Viv Exotic Reptile Heat Mat Holder has been specifically designed to enable heat mats to be used safely with wooden vivariums. It incorporates two layers of glass so that air can circulate across the surface of the mat to reduce the risk of overheating and thermal blocking. For use with any small to medium sized Heat Mats.Don't risk causing damage to your vivarium or property. Use heating equipment responsibly.