Prop shaft anode

[schrater]

I have a Ponderosa 35 (CHB class) with a single Ford Lehman engine and Borg-Warner Velvet Drive transmission. Not sure if these all have the same prop shafts...

I need to install a new shaft anode (old one seems to have been lost), and I don’t know what size to get. Shaft diameter? Length? Style?

 

[STB]

If you measure the shaft on the inside, the diameter will be the same on the outside.