Brand new, unused. It is not an original part,please carefully compare all the images of the item with the original parts of your vehicle, and check compatibility,or contact us directly. Inner Diameter (intake side):19mm,Outer Diameter (intake side):23mm,Inner Diameter (air filter side): 31mm, Outer Diameter(air filter side):37mm Replaces: 0450931, 0451730, 0450924, 0451668 For Tomberlin Cobra 50 2x4 2 Stroke ●For Tomberlin Cobra 90 2x4 2 Stroke ●For Tomberlin Kolt 90 2x4 2 Stroke ●For Tomberlin Revo 90 2x4 2 Stroke Carburetor For Tomberlin Cobra 50 Kolt Revo 90 50CC 90CC Carb