Perfect Compatibility: Compatible with Stihl 066 and MS660 chainsaws, ensuring a precise fit and optimal performance. Replacement Part: Designed specifically to replace the OEM diaphragm kit. Complete Repair Kit: Includes all essential components such as diaphragms and gaskets needed for routine maintenance or carburetor rebuild. Reliable Performance: Restores fuel flow regulation and engine efficiency, helping extend the life of your chainsaw and improve operation. Durable Construction: Made with durable materials that resist fuel, oil, and wear, ensuring long-lasting performance in tough working conditions., Manufacturer: EMSea