CAMP DONUT COLLAR ZINCS - A donut collar shaped zinc for a shaft. Zinc is used as a sacrificial anode on boats and ships that use cathodic protection to prevent corrosion of metals that are exposed to sea water. This zinc has a copper contact for a permanent ground. Sold by the each. (Donut Collar Zincs are measured by the inner circle diameter).

NOTE: Width of Donut Collar's
C-1 & C-2 .............. 1" Wide
C-3 thru C-7 ...........1-1/4" Wide
C-8 thru C-9 ...........1-3/8" Wide
C-10 thru C-15 .......1-1/2" Wide