Yellow Gold Filled Jump Rings, Open Jump Rings, 1/20 14K Gold Filled, Cadmium Free & Nickel Free & Lead FreeSize: about 5.2mm in diameter, 0.8mm thick(20 Gauge); about 3.6mm inner diameter.Gold filled uses a karat gold overlay which is then bonded to a brass inner core. Our Findings manufactures gold filled with 1/20th 14K gold, meaning, it is 5% karat gold by weight with a brass inner core.
