alloy and silica gel Imported No Closure closure Package contents: you will get 4 pieces black eyeglass chains, available in 4 styles, which are sufficient for you to use and replace in daily life, bringing you diversified choices to complete your matching Nice gift: these pendant eyeglass strap holders can be given as a gift to yourself, your lover, friends, family or other people on birthday, dating, wedding, Halloween, Mother's day, engagement, etc. Reliable material: the eyeglass chain is made of quality alloy and silica gel, which are durable and lightweight, not easy to rust and fade, can be applied for a long time without slipping off easily from glasses Versatile applications: these eyewear retainers are designed with anti-slip loops, which will securely and snugly hold on to your glasses, can be applied for holding various styles of glasses, such as sunglasses, reading glasses, and more About size: the total length of glasses chain is approx. 75 cm/ 29 inches, which is long enough and suitable for most people, using it can not only prevent glasses from losing easily, but also add more highlights to your whole dress up Note: Data are all measured manually, please allow for an error of 1-3cm. Due to differences in light and display, there may be a certain color difference, which is subject to the actual object received.