Package Includes: We offer four compression tester spark plug adapters in M10×1.0, M12×1.25, M16×1.5, and M18×1.5 thread sizes, with heights of 1.25", 1.25", 2.02", and 1.25". With multiple sizes included, this comprehensive kit ensures you'll find the right adapter for your engine
Practical Function: The adapter offers a stable connection interface for your compression tester, which helps you test the compression performance of various gasoline engines. Its high-precision thread ensures a tight connection between the spark plug and compression tester
Reliable Quality: Crafted from high-quality pure copper, these spark plug adapters resist deformation and breakage under stress. In addition, they have excellent resistance to wear and heat, ensuring long-term performance in high-temperature engine environments
Excellent Sealing: Each compression tester spark plug adapter features a black rubber O-ring that fills a gap to ensure reliable airtight sealing. This design effectively minimizes gas leakage through the threads, helping deliver accurate compression readings with every test
Widely Applicable: These spark plug adapters are engineered to be compatible with the W80577 compression tester and other testers with M14×1.25 external threads. They are suitable for a wide range of vehicles, such as motorcycles, snowmobiles, outboards, etc