niceeshop(TM) Round Unsoldered Open Jump Rings Connectors (Gold,Set of 100,4mm) Condition:100%brand new; Material:gold plated brass; Size:4mm outer diameter Satin and good craftmanship open jump rings,simply but make you pretty enoughEach is 21 gauge and measures 4 mm in diameter Durable,stylish and delicate,easy to work with and connects small items pretty well,opens easily to use and connect your chains or other items Handy,gold plated open jump rings are great as the female half of small clasps,charms,links,hooks and other fasteners Use to fasten the male half to your chain