4PCS Compression Tester Automotive Adapter,10mm×1.0/12mm×1.25/18mm×1.5/16mm×1.5 Cylinder Compression Tester Adapter,Spark Plug Testers Adaper for Gas Engine,Motorcycle

Thread it once. Trust it every timeProduct AttributesColors: Brass ColorSizes: 10mm x 1.0 Adapter: 1.26*0.71*0.71 inch12mm x 1.25 Adapter: 1.26*0.71*0.71 inch16mm x 1.5 Adapter: 2.03*0.71*0.71 inch18mm x 1.5 Adapter: 1.26*0.94*0.94 inchWeight: 3.93 ozMaterial: BrassPackaging: 4*Spark Plug AdapterPackage Sizes: 4.33*3.34*0.83 inchProduct Feature & FunctionsFour Most Common Sizes10mm, 12mm, 16mm, and 18mm thread pitches. Fits a wide range of engines. Make sure your compression tester uses 14mm×1.25 threads before buyingSealed and SecureThreads are cut with care for a firm fit. The built‑in rubber ring adds an extra layer of seal and keeps threads safe from wearBrass for Long UseBrass alloy stands up to repeated screwing and unscrewing. No cracking, no thread damage, no loose fits

• M10, M12, M16, M18: This set includes 4 car compression tester adapters in M10×1.0, M12×1.25, M18×1.5, and M16×1.5 sizes. Different engine types are covered. Check your thread specs before buying to ensure a proper fit
• Wide Engine Fitment: This car engine compression tester adapter kit works with many gas engines. Use on motorcycles, snowmobiles, outboard motors, and lawn mowers. Fits testers with 14mm × 1.25 thread (like W80579). Verify compatibility before purchase
• Rubber Ring Seal: These spark plug adapters feature precision-cut threads. A tight connection is made. The spark plug stays secure against the tester. A rubber ring boosts sealing performance. Threads hold up well to repeated use without damage
• Brass Construction: Brass forms our car compression tester adapter. Strength and hardness are high. The structure remains sturdy and stable. Wear resistance and durability are strong. High heat environments are handled for long-term reliable use
• No Extra Tools Needed: Operation is simple. No additional tools or complex steps are required. Screw the adapter onto the threaded connector. Attach to the engine port. Begin testing. Accurate compression readings are delivered. A solid choice for engine upkeep