Hign-concerned Chemical:NoneOrigin:Mainland ChinaDescription: Lightweight high-quality aluminum Turbine fuel-saving fan with single propeller Provides more dynamic control for the for intake system by forcing powerful airflow into the combustion chamber at high speed Increases horsepower and improves gasoline/fuel mileage Easy to install Accessories: Specifications: Size: 6.4 cm * 5 cm / 2.52*1.97 inches (diameter) Material: Aluminum alloy Color: Blue Package includes: 1 x Turbine air for intake 2 x Variable diameter aprons Note: Please check the diameter of your car's for intake pipe before purchasing. hello, guys, thank you for visiting my store.There are so many useful and cheap item in our store. If you need more this item ,you can contact us.we will give you our best price. Leave your message!