ITEM NAME:1 Pair O2 Oxygen Sensor Adapter Spacer Extenders Bung Isolator M18x1.5 38mm Description: - Super good Iron Nickel plating. - 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: Iron Zinc plating - Height: 38mm - Hex Diameter: Approx 24mm - Inner Thread: M18x1.5mm Package Included: 2 Piece O2 Oxygen Sensor Spacers 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.Inner Thread: M18x1.5mm. - Height: 38mm. 2 Piece O2 Oxygen Sensor Spacers. - easy to screw threads or can also be welded. - Withstands high exhaust temperature. Due to the difference between different monitors, the picture may not reflect the actual color of the item.