Features: Stainless Steel O2 sensor bung plug kit will seal any O2 sensors or wideband air/fuel O2 sensor bungs that are not being used in the exhaust system. Easy install. Using the standard thread pitch M18x1.5, O2 sensor bung plugs make it simple to install onto your exhaust system. O2 sensor bung plug design is more durable and easily accessible than other for head type plugs. No Leaks. O2 sensor bung plugs create a tight seal to prevent any exhaust leaks. Fits M18 x 1.5 standard thread pitch for modern O2 sensors and wideband air/fuel O2 sensors. Designed to fit standard style sensors and will fit most M18 x 1.5 bungs. Specifications: Material: Iron Thread: M18x1.5mm Size: m18x 1.5 standard thread (nut and nut) Plug size: OD 23mm, length 12.7mm. OD thread M18x1.5 Nut size: outer diameter 25mm, length 13mm. Inner diameter thread M18x1.5 Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings. Package includes: 1x O2 Sensor Plug 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. Sold by-YJL official store