This listing includes 1 brand new high performance universal 2 stage cleanable foam air filter. This filter has a straight rubber inlet that will fit 43 mm diameter to a 39 mm diameter of the back / mouth side of carb openings. It is universal for most Chinese 125cc 150cc 200cc ATVs, Dirt Bikes, Such as TaoTao, Buyang, Coolsport, Kazuma, Sunl, Roketa, Baja, Kinroad, KMD, AIM-EX etc. Fits on gy6 49cc / 50cc, 4 stroke 139qmb engines found on scooters, ATV's, go karts. Good quality! Please see the pictures before purchasing! Fits most scooters and mopeds 139qmb engines on some of the following brands (but not all models) - Roketa, Sunl, Baja, Kazuma, Carroll, Stream, Eeagle, Taotao, Redcat, Tank, Giovonni, Aimex, Jackel, Wildfire, Xtreme, Qlink, Yiben, Jonway, JM Star, Vento, TNG, VIP, Honda, Suzuki, Yamaha, Kawasaki, etc.