A. Ignition coils 181143211 and 181143212 are suitable for Dolmar PS - 5105, PS - 4605, Makita EA5000E, and CHAINSAVE. They can replace the original factory numbers 181143211, 181143212. B. Adefol is a retail store that sells cylinder block assemblies, spark plugs, air filters, carburetors, chainsaws, and other accessories. It has a wide range of products with different types of parts to meet various needs. C. Note: If you encounter any problems during the purchase process, you can contact us at any time. We are online 24 hours a day. Welcome to visit our store for consultation. D. Kind reminder: Please rate our products after receiving them. Thank you for your support. E. If you need to make a bulk purchase, you can contact us, and we will offer an appropriate discount. F. Our prices are quite affordable. G. Our delivery time is relatively punctual and fast. H. We have professional customer service staff. If you have any questions, please contact us at any time. We will help you solve the problems and aim to make you satisfied. I. The products are made of materials that are relatively durable, with certain power and reliability. J. The packing list includes 1 ignition coil. K. The goods are tested before shipment. L. Please check the compatibility of the parts with the models before placing an order to ensure that the correct accessories can support the normal operation of the products.