Utilizes siphon principle to inject liquid fertilizers into irrigation pipes for even crop irrigation Venturi fertilizer can be installed in parallel with the water supply pipe control valve of the irrigation system Made of quality engineering POM plastic, sturdy and durable, suitable for 1/2 inch BSP inlet/outlet connector Material: POM Plastic; Inlet/Outlet Thread Size: 1/2 inch; Rate of Flow Range: 0.29-0.81 M3/H, 0.7-0.95bar Efficient and compact differential pressure injector device suitable for agricultural irrigation system fertilizer and chemical injection Boost garden growth with efficient 1/2-inch garden fertilizer mixer for greenhouse, offering easy fertilization and universal compatibility