Efficient Ignition: String trimmer ignition coil module provides a strong stable spark, works with the engine's ignition timing system to that the spark plug is worked at the right moment to the quick start stable operation of the mower Voltage Boost: Ignition coil module can convert the low-voltage current in the power supply of the mower into a high-voltage current, ensuring that the spark plug can generate enough to the fuel mixture, its efficient combustion, improve the efficiency of the mower Reliable : Ignition wires adopt high-quality metal materials advanced manufacturing process, high strength, stable structure, wear resistance, resistance, high temperature resistance, stable performance, can adapt to various working conditions Compatible Models: String trimmer ignition coil module fit for 129C 129L 129LK 129RJ lawn mower, fit for Jonsered BC2228 GT2228 GTS2228 lawn mower, replace 597383401 579525402, please confirm your trimmer model before purchasing Easy to Install: Lawn mower ignition coil module can be replaced directly, plug play, so that you can easily perform lawn mowing work, giving you a beautiful neat lawn, please be careful to let the mower completely turn off before installation Colour:Black Material:Plastic Package Contents: 1x Lawn Mower Ignition Wires Only the above package content, other products are not included. Note: Light reflection different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is and\/- 1-3cm.