Universal, Engine Crankcase Breather Element, Crankcase Breather Filter w/ Chrome Cap, 1/2" Inlet I.D., Crankcase Breather Filter w/ Chrome Cap, 1/2" Inlet I.D., AIR FILTER, Air Intake Components, Vibrant Performance crankcase breather filters are available in Inlet I.D. Diameters ranging from 3/8" to 1.5"., 1/2"IDCrankBrthrFltr.