1Silicone Material: Made of flame retardant silicone, this heating pad is temperature resistance, with high temperature resistance 200C, low temperature resistance ?60C. 2Automatic Temperature Control: With built in imported normally closed temperature control, this heating pad will automatically power off after reaching the temperature, which is very safe and can be used with confidence. 3Fine Workmanship: This heating pad is well made with waterproof ability, insulation and composite sleeve, comes with a long life span. 4Scope of Application: This heating pad is suitable for a wide range of vehicles, including trucks, factory machinery vehicles, semi trailers, off road vehicles, tractors, bus commercial vehicles, agricultural vehicles, etc. whether it is construction machinery, marine equipment, generators, etc. Make sure to work in cold environments. 5Fast Heating: The heating ring of the filter element heats very quickly. The temperature of the appearance of the empty burning appearance can reach 80C within one minute. Obvious results can be achieved by preheating for 5 to 10 minutes.Item Type: Material: Silicone Specification: Length: Approx. 250mm/9.8in Width: Approx. 90mm/3.5in Power: 80W1 x The filter model of each model is different, so it is necessary to confirm which size to choose according to the diameter or circumference of the filter element. For example, 250 x 90mm is suitable for the filter element with a circumference of about 250mm. 90mm 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.