Approximately 12mm gunmetal plated brass reversible cloverleaf connectors. 2.2mm thick. Four 3.3mm inner diameter loops. JBB Findings is internationally known as a manufacturer of quality jewelry findings & supplies. Stampable and gluable. Can be used as links or multistrand connectors. Overall measurement includes loops. Black gunmetal color may range from gun blue to matte dark gray to shiny black metal.