Feature: 1. Quick Heating: One minute is more than enough for the heating to have 80℃ surface temperature, can also pre heat for 5-10 minutes for better effect. 2. Safe in Works: Waterproof design ensures stable work in both rainy and snowy days, and the normally close temp control will auto cut off the power. 3. Broad Utility: Suitable for equipments with diesel engines, such as factory machinery vehicles, semi trailers, off road vehicles, tractors and so on. 4. Good Material: The flame retardant silicone material can withstand -60℃ to 200℃, meanwhile the good insulation promises no leakage or short circuit. 5. Easy to Install: Comes with a light weight and a compact size of 300 x 120mm, the installation is very easy and can be quickly finished in minutes. Specification: Item Type: Silicone Heating Pad Product Material: Silicone Length: Approx. 300mm / 11.81in Width: Approx. 120mm / 4.72in Power: 100W. Package List: 1 x Silicone Heating Pad Note: The filter of each model is different, so it is necessary to confirm which size to choose according to the diameter or circumference of the filter. For example, 300 x 120mm is suitable for the filter with a circumference of about 300mm. 120mm refers to the height of the heating plate, measuring the circumference or diameter, as long as the perimeter is suitable, it can be used, and the height difference does not affect the use.