Attributes:* Inner Diameter: 2.5mm / 0.1"* Outer Diameter: 3mm / 0.12"* Total Length: 8mm / 0.31"* Material: Copper* Finish: ElectroplatingWhat Is Included:* 50 Pieces x Barrel End CapsApplications & Features:--- Cord end caps are a decorative accessory used to protect the end of a cord, protect the cord from wear and tear, and provide a beautiful decorative effect. Use leather, and lace, to make necklaces, bracelets, earrings, tassels, and jewelry.--- Made of copper, it is sturdy and durable, not easy to rust, bright and lightweight appearance, and smooth surface.--- The appearance is bright and light, and the surface is smooth and burr-free, providing a comfortable wearing feeling.--- Easy to use, just apply some glue on the end cap and insert the cord to fix it in place.