A. Here comes a bicycle stem bolt, an accessory suitable for upgrading mountain bikes! These bolts are specifically designed for mountain bike stems and can enhance your cycling experience. B. There are two sizes available, namely M5*20mm and M6*20mm. Different sizes can meet various needs and satisfy your diverse requirements for upgrading bike accessories. No matter what type of mountain bike you have, you can easily find a suitable size to match, making your bike look different. C. These bolts are made of steel. This material has good strength and durability, can withstand various pressures and impacts during cycling, and provides reliable safety for your ride. You can upgrade your beloved bike with confidence, without worrying about the bolts getting damaged or loose during use. D. Although these bolts are not imported products, their quality is not inferior. Due to their good quality and adaptability, they are popular in many sales regions, including Africa, Europe, South America, Southeast Asia, North America, Northeast Asia, and the Middle East. In addition, they have an authorized private brand, and their quality is trustworthy. If you are looking for suitable stem bolt accessories for your mountain bike, then these bolts would be a good choice.