Gold Filled 16mm Kidney Ear Wire. Stock up on these versatile, lightweight 14Kt yellow gold filled Kidney Ear Wires, and add value by offering matching earring sets to go with your necklace or bracelet designs. Ear wires can support custom charms, chains, or drops via an open pinch-loop at the bottom, which can be closed with pliers for extra security. Ear wire closes at back with a hook. Wire width: 24 gauge / .51mm Front length: 13.5mm Back length: 16mm Average width: 8.2mm Stamped 14K 1/20. Ear nuts sold separately.