Fine Silver 4mm Embeddable Jump Ring. A pure silver item for use with MetalClay. The outside diameter of the ring isapprox 4.1 mm, with an internal diameter of approx 2mm. The embeddable leg is approx 3.4mm long. The leg featuresindentations to give a good bond to the clay and is offset to enable you to postion the ring flush with the back of your work. Sold in packs of 25 pieces. How to use Embeddable Jump Rings