Marine engine zinc anode for all Caterpillar diesel engines. Zincs should be replaced every season or after 2/3 of zinc has eroded, which ever happens first. These are pre cut zinc engine anodes complete with brass plug and zinc.
E-0 Engine Zinc Anode 1/4" NPT x 1-3/4"
Engine pencil zincs-complete with end plug
Picture is of a larger size-for reference