Features: 1. The O2 CEL fixture actually includes a miniature m18x1.5 catalytic converter which helps get rid of the modified exhaust system or check engine light when the catalytic converter is removed. 2. Made of galvanized steel, which is durable and has high strength to use. 3. Avoid check engine light, catalytic converter built inside and will help get rid of the annoying engine light 4. Easy installation, direct screw on, no modification required. Specifications: Size: external thread M18 x 1.5 internal thread M18 x 1.5 Length 60mm Function: check engine light repair Color: silver Material: SS304 stainless steel Package include: 1 * oxygen sensor Note: 1. The actual colors of the item may be slightly different from pictures shown on the website due to many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data.