CAMP PENCIL ZINCS AND PLUG - Pencil zincs are designed to protect your marine engines from corrosion. They are to be screwed into the port on the raw seawater side of a heat exchanger. In order to make sure that you are getting the maximum protection, be sure to replace the pencils on a regular basis. When pencil wears away, all you need to do is replace the pencil and screw it back into the same bronze plug. This product is sold by the each complete with pencil and bronze plug.

DIMENSIONS:
E-0-C - 3/8" W x 1-3/4" L
E-1-C - 1/2" W x 2" L
E-2-C - 5/8" W x 2" L
E-3-C - 3/4" W x 2" L
E-4-C - 3/4" W x 3-3/8" L
E-5-C - 3/4" W x 3-5/8" L