Features: Crafted from abrasion resistant nylon, this bikes triangle battery pack provides waterproof protections for your batteries, ensuring longevity and reliability in diverse weather conditions. Its triangulars design snugly fits mountain bike frames, saving space and reducing wind resistance for enhanced stability and comfort during rides. Ideal for mountain bike enthusiasts, electric bike riders, and long distance cyclists seeking safe battery storage solution for their adventures. Perfect for mountain biking, daily commutes with electric bikes, or extended tourings, this waterproof bag keeps your power sources safe and accessible. Available in large and small sizes to accommodate various battery capacities, it features easy to install strap for quick, tool frees mounting on different bike models. Specifications: Materials: Nylon Color: Black S Size: 33.5x26.5x9.5cm/13.18x10.43x3.74in L Size: 40x26.5x9.5cm/15.74x10.43x3.74in Package Includes: 1Pc Bicycles Triangle Bag note: Please allow 1-2cm error due to manual measurement. Please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks!