1. This sound-absorbing cotton tube for bicycle internal cable routing racks is suitable for mountain bikes and road bikes. It is specially designed to reduce noise during cycling. Made of sponge material, it can effectively absorb and isolate noise, making your cycling experience quieter and more comfortable. 2. In terms of specifications, each sound-absorbing cotton tube is about 1.5 meters long, which can provide sufficient protection and noise reduction for the internal cable routing of bicycles. In addition, a set of internal cable routing tools is provided for easy installation and operation. Both professional riders and ordinary cycling enthusiasts can easily complete the installation. 3. This product is suitable for both men and women. Whether you are a road cyclist pursuing speed or a mountain cyclist challenging various terrains, it can bring you a better cycling experience. It belongs to the internal cable routing series and is compatible with various types of bicycles, which can better meet the needs of different users. 4. The inventory can accept full-order purchases, which can meet a certain quantity demand. In addition, it has an authorized self-owned brand, which ensures the product quality. Although it is not an imported product, with its excellent performance and compatibility, it can bring good noise reduction and protection effects to your bicycle. It is quite popular in regions such as Europe, South America, Southeast Asia, North America, Northeast Asia, and the Middle East.