Plain leverback ear wire components (aka French clips). 21 gauge (0.7mm). These extra-secure leverback ear wires add style and security to jewelry. 1/10th silver filled. A great alternative to sterling silver. 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. 1/10th silver-filled items are at least 1/10th silver by weight.