[Formerly SF870] Sterling silver oval jump ring in a 4x6mm size. This is the outside dimension. The wire is 21.5ga which measures 0.73mm. Oval jump rings work the same way as round ones but the oval shape keeps the pieces you are connecting with it away from each other. This gives some security in that small items like chain and wire will tend not to work themselves through the opening because gravity keeps them in the rounded ends of the oval.
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