With seven layers of progressively finer mesh cotton gauze media between 100% polyurethane top and base, the aFe Pro GUARD 7 heavy duty cylindrical performance filter provides excellent airflow for maximum horsepower and torque for Kenworth and Peterbilt over-the-road trucks. Washable and reusable for multipl e cleanings, the tall, open, evenly spaced pleats provide excellent dust holding capacity for longer service cycle between cleanings. Pliable polyurethane flange with integrated bumps insures tight, no leak seal over the life of the filter.