<b> Features: <b> <br><b>Material:<b> Satin silk, the satin cord we use is shimmered, strength, acid-proof, wear-resistant, not absorbing the sweat and will not fade<br><b>Length: <b>20”/ 50.0cm<br><b> Package Included:<b>50 * Black Necklace Cord <br><b>Customer Service:<b>If you have any problem of our product, you can click “seller contact” button in your Amazon account to email us. we would be delighted to help you and we will reply as soon as we can. <br><b>Product Warranty: <b>48 days money-back & 24-month warranty. Any questions you have, please don't hesitate to contact us.<b> If you like our product, click Add to Cart to get it. <b>