Description: 1. Threads are made with special tools for perfect precision and repeatability. 2. Simple structure, excellent material, not easy to deform or rust. 3. Universal acceories for most vehicles with M18 * 1.5 O2 sensor holes. 4. Made of high quality ,high strength and durable. 5. Simple installation, direct fixing bolts, no need to modify. The thread pitch is 18mm x 1.5 which is typical O2 sensor threads which means it will fit 99% of the O2 (oxygen) sensors in the market place. Specification: Color: Silver Material: Metal Thread Size: M18x1.5 Note: - There might be little error of size for manual measurement. - Due to different lighting effects and monitor settings, the actual item's color may not exactly reflect the color on pictures. Packing list Package Includes: 2 x O2 Sensor connector