Product descriptionSize: 2.5mColor: red, black, blueMaterial: nylon, plasticPackage content: 2pcs backpack with anti-drop shoulder strap buckle1.For Outdoor ActivitiesKeeps shoulder straps of your backpack securely in place and free your hands2.Abundant Zipper Pulls black zipper tags are enough for your spare or replacement; Good quality and lightweight accessories which is handy and easy to use3.Quick Release BuckleEach strap with a quick release buckle and easy to buckle and unbuckle4.Universal DesignAdjustable length , compatible with most sizes5.Extra FunctionYou can carry small accessories when you go out,Get an extra buckle