This sale is for a rebuilt International Harvester F-4 magneto with standard F-4 style impulse. This mag has been taken completely apart sonic and bead blast cleaned. Blown out, taps ran into all tapped holes, new coil, points, condenser, rotor, brushes and advance arm/point cover installed and armature end play adjusted as needed and magnet charged. NOTE: The impulse dust cover is cracked just a bit as you can see in picture. This part is getting very hard to find that is not damaged in some way. HOT and ready to install on your F-12, F-12, F-20 or F-30 project. Please see pictures and ask questions if you have them. We describe our items as accurately as possible. We do not know everything, so look at the photos as well as reading description completely.