For use on motorcycles, ATVs, go-carts, snowmobiles, air compressors, tractors and anything with a carburetor Use outside pre-filter dry for dusty conditions or oiled for extremely wet conditions Angled or straight design; black inner foam, red outer foam and a urethane flange Clamp directly to carburetor Made in the U.S.A.. UNI POD FILTER TWO STAGE