aFe MagnumFLOW Air Filters Round Racing PG7 A/F RR PG7 17.13 OD x 14.50 ID x 4 HTaFe MagnumFLOW Air Filters Round Racing PG7 A F RR PG7 17. 13 OD x 14. 50 ID x 4 HT Progressively finer mesh cotton gauze synthetic media between 100 percent polyurethane top and base; this high flow oiled performance filter provide maximum protection with highest cumulative filtration efficiency for severe duty environments. Outside expanded metal protects as well as enhances the look of the filter. Washable and reusable for multiple cleanings; the