Rockin Beads 400 Jump Rings Silver-plated Brass 5mm Round 18 Gauge. Open Jewelry Connectors Chain Links<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Silver Plated Steel for extra strength</li><li>1mm thick</li><li>Approx 5mm outside 3mm inside</li><li>Slightly Pre Opened</li><li>Rockin Beads (TM) Brand comes with Rockin Beads Size Gauge Card</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51IxQUbqmSL.jpg" noproxy>