Internal and external thread: The oxygen sensor extender has an oxygen sensor extender with internal and external M18x1.5 threads, which helps to control the engine light. High quality brass material: The oxygen sensor extender is made of high quality brass material, high strength, sturdy and durable. Glossy surface: The glossy surface of the oxygen sensor extender is smooth and free of burrs, with a glossy surface and is equipped with a perfect fixing washer. Threads made with dedicated tool - perfect accuracy and repeatability Easy to install: The M18 x 1.5 wire leaves enough space between the wire and the wire and can be used in almost all types of cars.