1. This bicycle inner tube features a 32mm American valve stem design and comes in a variety of sizes, including 20 inches, 24 inches, and 26 inches. Specific sizes are 26x3.0 American valve stem AV32mm, 26x4.0 American valve stem AV32mm, 24x4.0 American valve stem AV32mm, 24x3.0 American valve stem AV32mm, 20x4.0 American valve stem AV32mm, and 20x3.0 American valve stem AV32mm, which can meet the usage needs of different bicycles. 2. It is made of butyl rubber material and adopts an ultra-wide design, which can bring relatively good stability and comfort, providing reliable support for cycling. Its design is reasonable and can be adapted to bicycles of various specifications. Whether for daily commuting or leisure cycling, it is a good option. 3. This product has a good market in regions such as Africa, Europe, South America, Southeast Asia, North America, Northeast Asia, and the Middle East, and is recognized by consumers.