About the product: 1.Product name: car Air filter. Interface inner diameter: 12mm, filter size(L*W): 5.8*5cm/2.3*2inch, color: black/silver/blue/red. 2.Air filter installed in the carburetor or into the front of the air pipe, air filter to play the role of dust, sand, to ensure that the cylinder into the adequate, clean air! 3.Help to draw more air into your engine so as to improve throttle response and enhance horsepower. 4.The fine mesh increases the amount of air flow, straightens the flow and stops sucking hot air from high temperature engine compartment. 5.Easy to install (directly bolt on). Specifications: Item type: car Air filter Condition: 100% brand new Interface inner diameter: 12mm filter size(L*W): 5.8*5cm/2.3*2inch color: black/silver/blue/red. Package include: 1Pcs* Car Air Filter