14k Gold Filled Wire Guardian Cable Thimbles 0.53mm Hole 20pcs Style and Size : wire guardian cable thimbles 0.53mm (.021") hole Materials : 14k gold filled Quantity : 20 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.