1. Product contents: You will receive 20 necklace cords in random colors, each measuring 45 cm in length with a wire diameter of 1.5 mm. These cords come with lobster clasps, making them for DIY jewelry crafting and handmade accessories. 2. Product material: The necklace cords are made of polyester and metal. The polyester cord is wearresistant, durable, and not easily broken. The metal lobster clasp is sturdy and reliable, ensuring the necklace stays secure and doesn't come off easily, making it suitable for longterm use. 3. Adjustable design: Each necklace cord includes an extension chain, allowing you to adjust the length for a comfortable fit. Whether used as a necklace, bracelet, or other DIY jewelry accessory, it offers flexible styling options. 4. Multipurpose use: These colorful necklace cords are ideal for pairing with various pendants, beads, or other accessories to fulfill your DIY creative needs. They can be used not only for making necklaces but also as bracelets or decorative embellishments.