Description: 1.100% brand new and high quality. 2. Made of high quality material, durable and practical to use. 3. Our CEL eliminator is a small catalytic converter in front of the O2 sensor. 4. Don't risk using extensions because they usually don't work, this is a real mini built-in catalytic converter. 5. If the real catalytic converter is damaged, the CEL eliminator can help you reduce toxic gases. 6. Sometimes the CEL alarm is caused by the problem of the O2 sensor. For example, the O2 sensor is too sensitive. After loading the canceler, the CEL will still open. But it will still cause more code errors. 7. Our CEL eliminator (someone called it Mini Cat) cannot fix all the problems of the CEL alert. 8. It can only fix one of the P0420 codes - Catalytic Converter Fault (the most common). 9. Our CEL eliminator is versatile and suitable for most cars. 10. The built-in M18X1.5 catalytic converter helps get rid of annoying check engine lights. Specification: Length: Approx. 55mm/2.16in