14k Gold Filled 4.6mm Butterfly Clutches Earring Backs 10pcs Style and Size : 4.6x3.8mm post stud earring back Materials : 14k gold filled Quantity : 10 pieces 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.