Caswell Plug N' Plate Nickel/Gold Electroplating Kit Includes Nickel & Gold Plating Systems Perfect For Gold Plating Onto Copper, Brass and Other Alloys. Nickel Plate First, Then Gold Plate. Full Instructions and Free Technical Support Included Contact Caswell If You Have Any Questions Before Purchasing Gold Has 4 Month Shelf Life. Power Supply: 110VAC Input, 4.5V 300ma DC Output. US Plug