Apologies for not getting back sooner, I don't see any numbers, I measured from the tip of a blade to the center of the hole, it measures 9 inches. So I guess it's an 18 inch fan.
I'll cancel the other ad and combine all this for 25 bucks.MSD coil bracket, push in breather, coil cover, sunpro volt and oil pressure, Sport Comp oil pressure gauger, all are new.