Intended use :Disposable Endoscope Valves Sets is used for multiple endoscope working channels or ports to control the flow of liquids, gases and other substances.Disposable Air/Water Valves are intended to control inflow of gases and water, and prevent backflow.Disposable Suction Valves are intended to enable suction and prevent inflow of air.Disposable Biopsy Valves are intended to be used at the valve opening of the endoscopic biopsy forceps to prevent gas and fluid leakage during endoscopic surgery.