Make sure your designs turn out perfect with the 4mm 18 gauge matte black-plated open jump ring. This jump ring is versatile in thickness and in size, so you can use it to add charms or small dangles to designs. Link several of these jump rings together to create a cool chain mail design. Jump rings are the building blocks of jewelry designs, so make sure you always have some on hand. This jump ring displays black color with a soft matte finish.