1. Easy to install and excellent replacement for the old one. 2. It helps to improve the efficiency and performance of the chainsaw, can make the spark plugs generate enough energy for sparks. 3. Made of high quality metal material, safe and durable to use. 4. Long service life and low energy consumption, suitable for 2500 25CC chainsaw. 5. Stable performance, high reliability, perfect replacement for the old or original one.