18mm 02 sensor Weld-on 304 stainless steel O2 bung. Universal for the new small 18mm size oxygen sensors!

Universal stainless steel weld-on o2 bung, could be welded to mild-steel, steel, and stainless steel piping. Great for custom oxygen sensor location, place it where you like to prolong the sensor life and get better accuracy reading. This weld on bung is notch for 1" diameter tubing for the best fitment.