Features: Unique Stepped Design: Designed to add sensors anywhere you need it, perfect for custom exhaust pipes, headers, downpipes and more. Application: Mounting plugs and plug kits are perfect for adding sensors to exhaust systems. They can also be used to replace rusted or peeling factory stoppers. Precision CNC machining for tight, leak-free performance and polished surfaces Designed for , water, natural or propane and LPG, etc. Stainless steel 304 is suitable for corrosive environment, durable body design It is universal and fits American, European, Japanese and trucks. The unique stepped design on the stopper makes it easy to install. Standard M18 x 1.5 metric thread. Colour:As shown Material:Stainless steel Package Contents: 2 x o2 sensor adapter Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.