ITEM NAME:2 Pieces Stainless Steel M18*1.5mm O2 Oxygen Sensor Bung Extension Adapter Description: - Super good 304 Stainless Steel material. - Durable, never fade. - Withstands high exhaust temperature. - easy-to-screw threads or can also be welded. - Perfect to replace old or broken nut. Specification: - Material: 304 Stainless Steel - Height: 45mm - Thread: M18*1.5mm Package Included: 2 Piece O2 Oxygen Sensor Nuts Note: Please allow 0.5-1 inch difference due to manual measurement.(1 inch=2.54cm) Please check the size measurement and the picture carefully before making.Thread: M18 1.5mm. 2 Piece O2 Oxygen Sensor Nuts. - Super good 304 Stainless Steel material. - Material: 304 Stainless Steel. - Withstands high exhaust temperature. - easy-to-screw threads or can also be welded.