1.Includes 100 stainless steel rings, silver-colored, made of 304 stainless steel, providing higher precision, attractive appearance, rust resistance, durability, and oxidation resistance. 2.Size: approximately 10.5mm in length, 4.5mm in diameter, 3.0mm inner diameter. 3.Easy to use: simply insert the end of the cord into these mini stainless steel elastic cord crimps, then use pliers to flatten each crimp, securing it tightly onto the cord. 4.Wide applications: suitable for DIY leather jewelry making, cord ends for jewelry, use with leather, suede bracelets, tassels, lace, bead curtains, home decorations, linen, or ribbon cords. 5.The top round design makes it easier to attach to clasps for necklaces, bracelets, and other accessories; you can connect the clasp to the hole at the end. Note: The size is measured manually and may have slight discrepancies.