Round white plated brass jump rings with 8mm outer diameter, 6.7mm inner diameter. 1mm thick (18 gauge). About 170 pieces (1.2 gross) per ounce. Plated brass, easy to manipulate. White plating is also known as "imitation rhodium" and "silvertone". Questions? Call our friendly sales staff at 1-800-366-2156, or email us.