... innovations, dedicated to offering various sizes of Valve, specially used for Echo Sounder and Fish Finder, Sino-Norway Skipper factory is ISO9001 ... solution provider of marine equipments supplying a wide range of Echo Sounder, Fish Finder, Speed Log, Anemometer, NMEA Distributor, Repeaters, ... facility are based in Nanjing, China. Characteristics: Valve for Echo Sounder(Sino-Norway Skipper)