Item Type: Oxygen Sensor Adapter Material: Metal ID: M12 x 1.25 OD: M18 x 1.51STANDARD THREAD: The sensor adapter thread specifications are M12 x 1.25, M18 x 1.5, with standard size and is not easy to slip. 2EXCELLENT MATERIAL: Made of excellent iron material, the surface is electro galvanized, with high strength and not easy to wear. 3WITH GASKET: Equipped with gasket, it is more convenient to use with threaded adapters, and the connection is firm. 4FINE TESTING: High performance adapter accessories, all parts are tested and quality controlled before shipment. 5FOR CAR REPAIR: The oxygen sensor adapter and gasket are mainly used for car repair and have strong practicability.1 x Adapter 1 x Gasket Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.