Use the 90? 3/4 inch Short Plunge Drippers with the Drip Shield. Deliver water and nutrients straight to the root zone of your plants with the subsurface design, which allows the drops to fall 3/4 inch below the surface and dispense out of the three slots at its bottom. 1/4 inch barbed nozzle. Self-Cleaning, pressure compensating torturous path. Color coded for easy recognition. Reusable and made from BPA and lead-free plastic. 2 – 4 GPH/10 – 50 PSI.