Made of high quality material, durable and practical to use. Built in miniature catalytic converter and will help get rid of that annoying check engine light you get after modifying your exhaust or removing your catalytic converter, and sometimes even when installing a high flow catalytic converter. Don't take a chance on using an extension only as often they do not work, this is a real mini Catalytic Converter built into it. When you remove your catalytic converter, your post O2 sensor will see higher temperatures and greater flow of un-burnt fuel. M18*1.5 Oxygen sensor adaptation joint Adaptation model: GM Product weight without packaging: 250g Color: silver Material: aluminum alloy Quantity: 1p Packing list: 1*sensor adapter Only the above package contents are included, other products are not included. Note: Reflection of light and different monitors may cause the item's color to be slightly different from the actual item. Measurements allow +/- 1-3 cm.