ITEM NAME:O2 Oxygen Sensor Metal Weld On Bung & Plug Wideband Cap Set Nut & T9L2 Standard: Oxygen sensor plug kit Oxygen sensors can be installed wherever required It is suitable for custom exhaust device, header, downpipe, etc. Easy to weld Material: Iron Thread: m18x1.5mm Size: Standard M18 x 1.5 thread (plug and plug) The package includes: 1 oxygen sensor plug;.Easy to weld. Oxygen sensor plug kit. Oxygen sensors can be installed wherever required. Size: Standard M18 x 1.5 thread (plug and plug). Thread: m18x1.5mm.