JK Findings, Yellow Gold Filled Bead Tips Knot Covers, Real 14K Gold FilledSize: about 5.5mm long, 3.5mm wide, hole: 1mm, 10pcs.Bead Container: 6.8x5.2x1.1cm, 1pc; Packing Bag: 13x9cm, 1pc; Paperboard: 5.4x6cm, 1pc.Gold filled uses a karat gold overlay which is then bonded to a brass inner core. Our Findings manufactures gold filled with 1/20th 14 karat gold, meaning, it is 5% 14 karat gold by weight with a brass inner core.