Safety BasicsThis is an excellent decoration for bicycles and an indispensable protective gear for night riding, especially in autumn and winter. At night or in bad weather, it will reflect under the lights and issue safety warnings to improve riding safety and reduce the risk of traffic accidents (Note: These are bicycle reflectors. It cannot emit light by itself and needs external lighting) ONE SIZE ONE The bike reflector is 80mm long, 1.9-2.4mm inner diameter and 5mm outer diameter. Please confirm the size before purchasing. The reflectors come in packs of 48 and are suitable for most types of bikes, for example, you can even put on a safe and fun DIY bike show. Easy to assemble The bike clip has a countersink on the side, no glue, no special fasteners or tools required. Simply slide the spoke reflector onto the spoke and gradually press down. When you want to replace the reflective bike clip or you no longer need it, simply pull it out. Anyone can install and remove it easily. High Quality MaterialBike reflector is made of high quality ABS pipe and reflective coating film, durable and not easy to fade. Waterproof and lightweight properties allow use in wet weather without adding stress to the bike. Gray is stylish and simple, so it is very light and beautiful. High Visibility Our bike reflectors can reflect light in low light conditions and are clearly visible even at a distance of 400 meters. Bike wheel reflectors provide 360 reflection and improve lateral visibility for safe riding in the dark and poor weather conditions. The reflector itself cannot reflect light and requires external lighting.