2.using the vacuum suction generated by the through the Venturi tube, the solution from the open bucket evenly inhaled into the pipe system fertilization. Make your operation more convenient and simple.3.the scope of the product: greenhouse and other small area fertilization. 1.Venturi-style injector and irrigation system installation, the use of small control valve be closed to form a control valve before and after the pressure difference, can make your dissolved in the water into the venturi-style manure into the inflow Water supply pipeline. Features: and High Quality.Excellent chemical resistance to most of the chemicals. Highly efficient and compact differential pressure injection device.Irrigation water tube pipe with control switch & filter. Come with a Venturi with 25mm Inlet/outlet thread, Manufacturer: Mcnhbdgg