CHEFS Electrolytic Cleaning Plate : Used by museums, self-acting cleaning plate easily removes tarnish from silver, sterling silver, copper, bronze, gold, stainless steel, chrome, quality brass, and more. Nontoxic and easy to use. Plate lasts indefinitely with simple care. 8"L x 6"W. Please read instructions properly before use. In addition to this electrolytic cleaning plate, it is required to dissolve 4 tablespoons of arm and hammer baking soda or Calgon liquid water softener in one gallon of hot water to begin the cleaning process. CHEFS signature collection of professional-grade kitchen tools, cookware, bakeware, dinnerware and more, is available only at CHEFS Catalog. You will love the selection -- meticulously crafted and tested to delight the most discerning cook, these tools deliver exceptional quality, performance and durability in the kitchen.