Function: This adapter features an M18*1.5 thread pitch and a length of 45 mm, designed to facilitate the use of spark plug spacers, effectively managing the distance between the O2 sensor and the exhaust system.Durable Material: Constructed from high-quality iron, this oxygen sensor adapter offers exceptional strength and longevity, ensuring it remains free from rust and corrosion for extended use.Simple Installation: Compatible with most modern vehicles that have M18*1.5 mm oxygen sensors, this adapter allows for straightforward installation without any modifications required, making it user-friendly.Versatile Compatibility: The universal 18 mm threaded base makes this adapter suitable for a wide range of vehicles equipped with M18*1.5 O2 sensor holes, enhancing its usability.Portable Design: Compact and lightweight, this adapter is easy to store in your vehicle, allowing for convenient access and use whenever necessary.