Rockin Beads Brand， 400 Jump Rings， Silver-plated Brass， 4mm Round， 21 Gauge. Open 2.6mm Inside Jewelry Connectors Chain Links Sold Per Pkg of 400<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Silver Plated Brass</li><li>0.7mm thick</li><li>4mm outside 2.6mm inside</li><li>Open not soldered</li><li>400 per package</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51w%2Ba7YqSGL.jpg" noproxy>