C-23 Collar Zinc Anode Zinc with straps These plate boat zincs are

These  plate boat zincs are for bolt-on attachment

Center to Center: 12"

Inside Diameter: 5"

Length: 17"

Inside Diameter:  6"

C-23 Collar Zinc Anode Zinc with straps These plate boat zincs areInside Diameter: 5 1 2" Outside Diameter: Weight: Whether your boat is sailing in either fresh or sea water is inevitably exposed to the hazards of corrosion. All Zimar collar zinc anodes include copper contacts for permanent ground and stainless screws with washer retainers. Zimar collar zinc anodes weigh more than the competition, due to their higher quality and perform their cathodic protection job better. Zimar collar zincs meet the standards set