Best Feature：Increase Engine Life.Reduce Carbon Monoxide And Hydrocarbon Up.No Cutting On Fuel Line.Does Not Void Vehicle Warranty.Improve Fuel Economy.Specifications:Brand Best & High QualitySize: 6 CM long， 4.1 CM wideHole Diameter: 1.6cm / 0.63"Package includes:1 x Universal Blue Trucks Cars Magnetic Gas Oil Fuel Saver Performance