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 M12x1.25 hex head, 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 head type plugs. No Leaks. O2 sensor bung plugs create a tight seal to prevent any exhaust leaks. Fits M12x1.25 standard thread pitch for modern O2 sensors and wideband air/fuel O2 sensors. Designed to fit standard style sensors and will fit all M12x1.25 bungs. Package Includes: 1x O2 Sensor Bung Plug Specifications: Material:304 Stainless Steel Size:Approx.1.27cm/0.5inches Color:Silver 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.