When it&';s time to replace the hose on your existing hydration system, Osprey&';s HydraulicsA(R) Reservoir Hose is here for you. Made of high-quality quarter inch tubing for dependable performance and featuring a high flow rate, it will bring new life to your hydration system. All parts are BPA-free, phthalate-free, lead-free, guaranteed. All materials are certified food safe according to FDA and EU regulations. Flexible 1/4"/.635cm hose for faster water flow