Universal, Oxygen Sensor Bung, Standard Oxygen Sensor Bung (Bag of 5, Bulk Pack), Standard Oxygen Sensor Bung (Bag of 5, Bulk Pack), S.S. WELD BUNGS, Exhaust Bungs, Vibrant Performance Standard Oxygen Sensor Bung is made of 304 Stainless Steel and mild steel., SSO2SensrM18x1.5-5Pk.