This interchangeable dripper is designed with a self-cleansing, tortuous path, which slows the water as it is delivered at a uniformed rate from the reservoir of a Flood & Drip Shield. Since there is no pressure applied other than gravity, these drippers have been tagged The World’s Slowest Drippers. Comes in a pack of six drippers. Deliver water and nutrients straight to the root zone of your plants with the subsurface design, which allows the drops to fall 3/4†below the surface and dispense out of the three slots at its bottom. Slowly deliver water and nutrients to your plants with the 1 mm pressure-compensating tortuous path. Color-coded for easy recognition. Snap and pop technology. Reusable. BPA and lead-free rubber and plastic.