Featuring sturdy structure and wear resistance, this oxygen sensor adapter can achieve long term use and is not easy to decompatiblem or break. It is easy compatible you to install. The oxygen sensor adapter, which has high precision and stable percompatiblemance, can be an ideal replacement compatible the old or broken part. It is needed when using a HHO system or a test pipe. It is constructed of metal material. The length of this product is 3.49cm, the width is 2.47cm and the height is 2.47cm. It is suitable compatible most cars and vehicles. Item Name: O2 Sensor Adapter Material: Metal Features: Fine Workmanship, Easy Installation, Replacement Size Details: L: 3.49cm/1.37", W: 2.47cm/0.97", H: 2.47cm/0.97"(Approx.) Notes: 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. Package Includes: 1 x O2 Sensor Adapter