This is a two piece design that involved a base to hold water, equipped with a hole on the side to allow for the pump hose. The hole on top is sized to fit the second piece of the design, which is the net pot. A small, simple design for a single plant hydroponic system. I would like to point out that this system isn't compatible with the other net pots I have made on here, as they are about an inch bigger. Sorry for that!