Main function It helps to improve the efficiency and performance of the chainsaw and can enable the spark plug to generate sufficient ignition energy. Scope of application Long service life, low energy consumption, suitable for 2500 25CC small chainsaw. Easy to use Easy to install and can replace the old ones well. RELIABLE With stable performance and high reliability, it is a perfect replacement for the old models. Advanced materials Made of Made of high quality metal materials, safe to use.