Description: Highly efficient & compact differential pressure injection device, the use of siphon principle. Fertilizer & chemical injection through drip & sprinkler irrigation systems.A venturi is a device which creates a vacuum when fluid flows through it. The fluid which creates the vacuum is known as the motive fluid. The motive fluid for irrigation injectors is the irrigation water itself. Vacuum created by the venturi sucks fertilizer or chemical into motive water. Specifications: Material: Plastic Dimensions: 143 x 75 x 30mm Inlet / outlet Thread Diameter: 25mm Color: Black Net weight: 40g Package Included :1 x 25mm Irrigation Venturi Fertilizer Injector