Magnesium Hull Plate Anode To keep your boat running smoothly and efficiently all season long, we provide a wide range of boating accessories. Browse from the wide range of products and choose the right boat accessories depending on your needs, preferences and budget.Features Magnesium Hull Plate Anode Capacity: 1.80 lbs Specifications Size: 8.375 x 4.312 x 1.625 in.