14k Gold Filled Flat Coil Fishhook Earwires 10pcs Style and Size : fish hook flat coil ear wire, loop to top:14mm, tip to top: 20mm, 21gauge wire. Materials : 14k gold filled ( 14kGF stamped ) Quantity : 10pcs 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.