Features Uniform Distribution: This is a strong and durable air filter element, the filter material is evenly distributed, and it is easy to replace the filter material. Polyester Fiber : This is an air filter element is made of polyester fiber with low initial resistance and can be cleaned repeatedly. Cast Iron Forming: This is an engine air filter element is made of cast iron, which is more rigid and durable. Precise Craftsmanship: In order to ensure durability and accuracy, the air filter element is a manufactured part that has been tested many times. Professional Application: This is a gasoline engine filter for GX390, has long service life. Specification: Item Type: Air Filter for GX390 Material: Polyester Fiber + Cast Iron Package List:1 x Air Filter Package List 1 x Air Filter