Universal 18mm Thread Nickel Plated M18 x 1.5 Bung Adapter Kit Lambda O2 Oxygen Sensor Spacer Isolator Extender Joints Converter Tools Feature: 1. Oxygen sensor extender oxygen plug welding + nut + cover general tool kit, suitable for any 18 mm silver-plated iron thread; 2. Designed to add oxygen sensor wherever you need; 3. It is very suitable for installing customized exhaust pipes, headers, down pipes, etc. Specification: Product name: Oxygen sensor connector kit Material: Iron Surface treatment: Nickel plating Color: Silver Outer diameter: 25mm/0.98in Thread: M18x1.5mm (nut) Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2mm measuring deviation due to manual measurement.