5 New 14k Gold Filled Charm Snap Bails. This is a new set of 5 14 karat gold filled Charm snap bails. These are used to attach Charms to necklaces or bracelets. Jewelry that is gold filled has gold content equal to 1/20th or more of the total weight of the metal in the piece. Each measures approximately 8 x 2.5 mm (5/16" x 1/8").