Place your Flood & Drip Shield on the top of almost any three to five-gallon pot with a diameter of 9-12 inch, and use it along with a variety of interchangeable products such as the World?s Slowest Drippers, aka the Gravity Drippers, as well as the Quicker Drippers and Eliminators. Eliminates algae and pesticides by covering the media. Built-in overflow where excess water and nutrients are delivered straight to the root ball. BPA and lead-free rubber. Instantly transforms from a top feed to a top-feeding drip system with the Barbed Insert.