Mr. Gasket 4354 Deep-Dish Air Cleaner Features a deep-dish, highly polished, chrome top accented by a chrome-plated wing nut Includes PCV (Positive Crankcase Ventilation) valve assembly Designed to fit 1 and 2-barrel carburetors with 4 diameters and 2-5/16 or 2-5/8 diameter necks Flame-retardant, replaceable, paper element with a high CFM rating is used for safety Top and base material is made of steel with chrome finish