COR-IN 1/4" NPT x 3" Zinc Pencil Anode Complete with Brass Plug

1/4" NPT Brass Plug x 3" length of zinc rod complete

Rod diameter: 3/8" Rod Thread: 3/8 24 NF Wrench Size: 9/16"

Not sure what size? Watch our video below to help identify it. 
https://youtu.be/K7D6DZgMerA

If you cut down zinc length will work with:
Caterpillar Marine Engine Anode Cross Reference
6L2283
Westerbeake/Universal
011885
Crusader
CRU10335
CRU10972
CRU168005
Also known as sacrificial anodes, pencil anodes or engine anodes, these zinc rods are consumed by any electrolytic action that would otherwise attack and corrode your valuable equipment. A reinforcing steel core holds zinc in place until it's completely consumed. They come with NPT hex brass plugs. Zinc rods protect from corrosion and scaling in hot water applications. Ideal for use in salt water.

ELEMENT

Zn % Balance
Fe % 0.001
Cu % 0.001
Cd % 0.054
Pb % 0.002
Al % 0.240