Fertilizer Injector is made of quality engineering POM plastic, good workmanship, sturdy and Economic and lower cost choice for you. Applicable for agriculture irrigation system fertilizer and chemical injection. With outstanding chemical resistance to most chemical. Efficient and compact differential pressure injector device Based on the motive water flows and Vacuum suction, just need to install the black fertilizer applicator in parallel on the garden lawn plastic water pipe. Encourages deep root development for improved tree and shrub stability.