A. This bicycle frame protective cover is designed for mountain bikes and road bikes, and it's a good option for protecting the bicycle frame. It can effectively protect the derailleur and brake cable sleeves and prevent the frame paint from being scratched, keeping your bicycle looking good all the time. B. In terms of specification, it features a closed cable sleeve design, suitable for various mountain bikes and road bikes, and can provide all - around protection for the bicycle cable sleeves. C. In terms of quality, it has reliable quality assurance and an authorized self - owned brand. It is widely sold in regions such as Europe, South America, Southeast Asia, North America, and Northeast Asia and is well - received by consumers. D. Its purpose is clear. It can not only protect the bicycle frame and cable sleeves and extend the bicycle's service life but also enhance the overall aesthetics of the bicycle to some extent. Whether you are riding daily or on a long - distance trip, it can offer protection for your bicycle.