The Topeak Valve Extender Set (40 mm, Pair, Black) provides a professional solution for riders using deep-section rims or aero wheels. Machined from aircraft-grade aluminum alloy, these precision extenders lengthen two-piece Presta valves for easier inflation and pressure adjustments. Each extender weighs only 1.8 g and includes a durable aluminum valve tool for tightening or removing valve cores and extenders. For an improved air seal, wrap the threads with Teflon tape before installation. Compact, corrosion-resistant, and easy to carry, this set ensures reliable performance for both road and triathlon bikes.