French hook ear wire components. These earring hooks are made of 22 gauge 1/10th silver filled wire. A first-rate alternative to sterling silver. With silver-plated brass coil and 2mm bead. Treated with a lacquer finish to prevent tarnish. Silver fill is a layer of 0.925 or greater silver which is mechanically bonded to a brass core. It is 100's of times thicker than any silver plating.