brand new and high quality Features:After a high flow exhaust or a tune, the O2 sensor is seeing too much flow. The use of this adapter/restrictor is necessary to have all the OBDII monitors read a "Ready State" for emissions testing.Adjustable design: Oxygen Sensor Simulator Fitting with Adjustable Jets, allows the sensor to be mounted in any orientation to maximize exhaust clearance.adjust the angle of screwing in the extender.Easy to install: Use one of the three (3) included jets to help fool the O2 Sensor and eliminate Check Engine LightsNote: Prevent CEL (Check Engine Lamp) / MIL (Fault Indicator) from illuminating when disassembling the material catalytic converter.Our fittings are made of top quality materials, are easy to weld. If you have any question please feel to contact us. Specification:Material: Stainless steelPackage Size: Approx.10x6x8.5cm/3.94"2.36"3.35"Applicable models: OBD2 models with M18x1.5 threaded oxygen sensor Note:1.Transition: 1cm=10mm=0.39inch2.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package includes:1pc x Sensor Connector3pcs x Adapter