OLD NEW STOCK. Quantity: 2. Electro Guard, Inc. Model 620BR-Kit Impressed Current Cathodic Protection System. Automatic Impressed Current Control and Monitoring System. This impressed current cathodic protection system provides totally automatic protection and STOPS CORROSION IN ITS TRACKS! For boats with wood or fiberglass hulls and underwater metals (Copper & it's Alloys, Stainless Steel, Lead, Etc.) to 30' LOA. Complete installation kit includes: 620 controller, two color LED display, reference cell & ceramic coated, titanium anode.