The Geigerrig Force Valve made by Hydrapak is a sleek and functional BPA and PVC free bite valve built for your Geigerrig hydration engine that provides a high-flow, steady stream of water. The Geigerrig Force Valve fits your Geigerrig engine and provides a steady flow of water as you need it. The Force Valve is constructed of high tech, medical grade materials with a 1/4″ diameter fitting and self-seals to hold the pressure. Give the valve a quick twist to turn off an prevent water leaking when not in use. Features and Specifications High-flow valve with a steady stream Self sealing silicone holds the pressure Universal 1/4" diameter barbed fitting Highest water flow on the market Protective dust cover High grade compression molded silicone sheath Twistable locking on/off design BPA and PVC free Made of high-grade compression molded silicone and Thermoplastic Polyurethane;HDPE Weight: 16 grams 33 mm x 58 mm