Specification: Material: Aluminium Alloy Color: Black Size: 40mm Fitment: Universal for 50cc/110cc/125cc/140cc/150cc/160cc Motorcycle Compatibility: Our air filter is suitable for general-purpose models of 50cc / 110cc / 125cc / 140cc / 150cc / 160cc motorcycles. Working Principle: The gas filter is installed in front of the carburetor or the intake pipe to filter out dust and sand in the air to ensure sufficient and clean air in the cylinder. The air filter is a very inconspicuous part because it is not directly related to the technical performance of the car but in actual use the air filter has a great influence on the service life of the engine. Increase Horsepower: The role of motorcycle air power is critical for motorcycles. It mainly filters dust from the air to prevent dirty air from entering the cylinder and aggravating wear. It is designed to improve throttle response and increase horsepower.