Nostalgia ride bell top spun aluminum air cleaner complete Overall height off the top of the carburetor is 4-1/2". Spun aluminum bell top and Cad plated steel base that fits the standard 5-1/8" diameter aftermarket and many OEM 4 barrel carburetor inlet. About 13" overall diameter and comes with the 10"x 2" paper filter element. Included is a ¼ coarse thread 6" stud with a chrome acorn nut to finish it off free shipping 76.00