The 3 inch "T" Short Rocket Drippers have rocket wings to add to the stability inside of the media. As stand-alone drippers, they can be used inside, outside and with the Drip Shields. 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. 1 - 4 GPH/10 - 50 PSI.