3mirrors Car Oxygen O2 Sensor Adapter Spacer CEL Fix Check Engine Light Eliminator M18X1.5 48MM/1.89in

Poor Welding Not sure what material they were but they did not weld good at all. They are magnetic. I TIG welded them and the bung material melted away oddly, similar to the way a cast material does. Maybe the alloy was good for machining quality but poor for welding. Machining quality was great.