FloraFlex Short Plunge Drippers (3/4'' Length) are used with the Drip Shield. FloraFlex drippers are all strategically designed to be a Subsurface Drip System with water and nutrients delivered straight to the root zone of your plants. Water and nutrients travel down a 1, 2, or 4 GPH torturous path, the drops then fall 3/4'' below the surface dispensing out of the three slots at its bottom.