It is mainly used to the engine. When the engine is running at high speed, the high temperature and friction in the crankcase caused by the high-speed operation of the crankshaft will cause the deterioration and vaporization of the oil, so that the crankcase generates high pressure, so the deteriorated vaporized oil must be discharged from the crankcase. This kind of engine oil and gas is "highly ", so the original car uses the engine oil and gas to enter the intake manifold so that the engine manages to burn these "highly " gases, reducing the engine power is a small matter, making the throttle very dirty and affecting power and Fuel consumption. The oil ventilating pot collects waste oil by separating oil and gas, and then the separated air is sent to the intake manifold. So its main function is to the engine, keep the throttle valve , and reduce fuel consumption! Weight: 616g Color: silver, black Material: aluminum alloy Quantity: 1pcs Packing list: 1*car vent pot Only the above package contents are included, other products are not included. Note: Reflection of light and different monitors may cause the item's color to be slightly different from the actual item. Measurements allow +/- 1-3 cm.