Feature: 1. Normally Closed Temperature Control: This heating pad is made of flame retardant silicone. It is resistant to high temperature up to 200°C and low temperature up to ‑60°C. The built in normally closed type temperature control can control the power off automatically when the temperature is reached. 2. Easy to Install and Disassemble: The leading wire of the heating pad is upgraded to a composite set of wires, which is more durable. Very long service life, very easy to install and remove. 3. Waterproof Design: The heating pad is designed with waterproof design, rain and snow do not affect the use. Excellent insulation, no leakage, no short circuit, make considerations for your usage security. 4. Light Weight: The heating mat heats up very quickly, and its own temperature can arrive at 80°C within a minute, with a small volume and light weight, preheating for 5 to 10 minutes to achieve great results. 5. Applicable Scenes: The heating pad is suitable for factory machinery vehicles, semitrailers, buses, commercial vehicles, agricultural vehicles and so on can be installed. As long as the engine, whether it is construction machinery, marine device can be installed with the use, to ensure that the operation and construction in the cold environment. Specification: Item Type: Silicone Heating Pad Product Material: Silicone Product Specifications: Approx. 200 x 70mm / 7.87 x 2.76in (L x W) Power: 50W. Package List: 1 x Silicone Heating Pad Note: 1. Each cartridge model is different, so you need to confirm which size to choose according to the diameter or perimeter of the cartridge, such as 200mmx70mm, which is suitable for cartridges with a perimeter of about 200mm. 2. 70mm refers to the height of the heating plate, the perimeter or diameter, which can be applied as long as the perimeter is suitable, and the height difference does not affect the use.