Superior Heat Mat 20W. The layout of heating and heat dissipation superior heat mats is given. 7 kinds of different wattages and size may be selected. It may be different in cold zone and heating zone. The heating area should be less than 2/3 od feeding area. it may be selected according to the actual conditions the internationally advanced ultrasonic wave seal process is used, which is safer than ordianry heat mats. the products passed rigorous America ETL certification and European CE certification. Four rubber pads are matched considering the safety. the seamless cylinder may be heighttened and vetilated to rpevenet fire caused by hear accumulation. suitable to reptile pets and small pets. produce natural heat and warm your pets. it may be installed at bottom of reptile box or side of the terrariums. effectiveley improve appetitie and promote metabolism. fix four rubber pads and gum at different positions.