ITEM NAME:Replacement CEL Fix Oxygen Sensor Extension Spacer Adapter 50mm Bung - M18x1.5 Description: Super good 304 Stainless Steel. 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: Stainless Steel Height: 50mm Inner Thread: M18x1.5mm Package Includes: 1 Piece O2 Spacer 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: 50mm. 1 Piece O2 Spacer. Withstands high exhaust temperature. Due to the difference between different monitors, the picture may not reflect the actual color of the item.