General description Sealey Nitrogen Oxide Sensor Port Thread Chaser is designed for cleaning and repairing damaged threads on the sensor port before fitting a new sensor. It is suitable for use with Mercedes-Benz and Vauxhall/Opel NOx sensor port threads. Technical specifications Manufactured from Chrome Vanadium steel Black phosphate finish for corrosion resistance Thread Size: M22 x 1.5mm Use with 22mm socket or spanner Model No. VS536 Usage Clean and repair damaged threads on sensor ports Prepare the sensor port for new sensor installation