Name: anti-slip glasses chain Length: about 70cm not including both ends; due to manual production, there will be a 1-3CM error. Mind taking photos with caution! Weight: about 6.3 grams (actual arrival weight shall prevail) Features: High-end anti-slip glasses chain, fine workmanship, comfortable and safe, good electroplating texture, put on the tail of the glasses legs to prevent glasses from slipping during exercise, suitable for matching with all kinds of glasses and clothing, you can take off your glasses and wear them on your chest at will, whether you are doing sports , traveling, or attending a banquet, it is your favorite pair of glasses. How to use: First put the rubber rings at both ends of the glasses chain on the temples, then use the metal buckles on the rubber rings to press against the temples and fix them. Packing quantity: 1 piece.