This Item can have a cast number.Cast number and Part number is usually not the same. Cast number is not a Part number. M3BP200 Gen A & G,M2AA200 Gen A M3AA 200 Gen A, C and G ID = 49 mm, OD = 250 mm, Height = 88 mm, Key 16*5 mm Key is integrated in centre hub Code 068 Metal fan kit = 5FSE704229-5