Stan's NoTubes Universal Tubeless Presta Valve Stem PairInternational products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions. Aluminum valve stem weighs approximately half the weight of the aluminum valve standard (brass) for lightweight performance. By reducing the weight near the valve, you can expect better weight balance and stable ride when the wheel rotates. Features: Aluminum (FV) with a