Jump into the 4mm rhodium silver style game with these open jump rings! These 21g rings are perfect for creating simple and strong jewelry - just the way you like it! The antique silver look will add a classic touch to any finished product. Get a jump on the competition and make your crafting stand out! -4 mm outside diameter -2.7 mm inside diameter -.7mm thick, 20 gauge -Silver toned iron alloy Contains small parts. Not intended for children.