Quantity :20/50/100 pieces per set Color: colorful rubber with silver metal coil (all loops were chose by randomly) Size: approx. 21x4mm Material: metal , rubber Friendly Tips: The size is measured by hands, please allow minor error of measurement. Photo color might be a little different from the actual product due to color display of different monitors If you need large quantity, please contact us & we’ll be happier to fill your request. Silver Coil Colorful Rubber Loop Connectors, Eyeglass Holder Glasses Spectacle Chain Strap End Holders