aFe Power 72-91046 Air Filter High performance filter will outflow stock paper filter Washable and reusable for multiple cleaning cycles Constructed with 100% polyurethane on top and bottom Five layers of progressively finer mesh cotton gauze media and two layers of synthetic media 6 F x 9 B x 9 T (Inv) x 7-1/2 H in Improves airflow for better performance and acceleration Pre-oiled, washable/reuseable air filter for long service life with life-time warranty Patented Pro-GUARD 7 Five-Layer Progressively finer mesh cotton media with Two-layer Progressively finer porosity synthetic media for highest filtration efficiency for extreme dust environments. Tall, Rounded, evenly-spaced pleats for maximum dust holding capacity Constructed with 100% pliable polyurethane for great seal without the use of foam gaskets or sealing grease.