14k Gold Filled 35mm Kidney Ear Wires 4pcs Style and Size : 12x35mm kidney ear wire 20.5gauge wire. Materials : 14k gold filled ( 14kGF stamped ) Quantity : 4pcs Gold Filled: Gold filled is an actual layer of gold-pressure bonded to another metal. Gold filled is not to be confused with gold plating as filled literally has 100% more gold than gold plating. Gold filled is much more valuable and tarnish resistant. It does not flake off, rub off or turn colors. safe for people with sensitive skin.