Decorative antique brass center-crimp tubes with loop. Approximately 6x12mm overall, 3.8mm inner diameter. Lead free and meets the EU Nickel Directive. JBB Findings is internationally known as a manufacturer of quality jewelry findings & supplies. Use one loop end with matching hook end. Will accommodate chain or cord up to 3.8mm. Crimp (flatten) only the center section of the tubes, leaving the ends intact. Overall dimensions include loops. Size and shape will vary +/- 10%.