Feature 1Coincided by 3 layers different densities sponge, relatively thicker sponge on both sides plays a supporting role and filter large-particle impurities 2Thin and high density sponge in the middle, which is the key to prevent tiny dust and effectively reduced the intake resistance 3A excellent filter sponge designed for superior filtration while still providing excellent airflow 4Made of high quality sponge material, reliable to use and easy to install 5Replacement for mushroom head air filter to increase the intake volumeFeatures: Coincided by 3 layers different densities sponge, relatively thicker sponge on both sides plays a supporting role and filter large-particle impurities. Thin and high density sponge in the middle, which is the key to prevent tiny dust and effectively reduced the intake resistance. A excellent filter sponge designed for superior filtration while still providing excellent airflow. Made of high quality sponge material, reliable to use and easy to install. Replacement for mushroom head air filter to increase the intake volume. Specifications: Condition: 100% brand new Material: sponge Color: red / yellow / green (optional) Diameter: 250mm / 9.8" Height: 20mm / 0.8" Quantity: 1pc Package Weight: approx.50g Fitment: for mushroom head air filter Package List: 1 * Air Filter Replacement Sponge Note: Please kindly check the dimension before ordering to make sure this item is perfectly fit.