A small sprinkler for watering plants.My first design and thus not unlikely to have flaws in the design. I am to use it on my balcony where I am building an automatic watering system running on a 12 volt battery. The water pump comes from the wiper system on a car and connects to a hose with 5mm inner diameter. This hose is then supposed to connect to several of these sprinklers placed amongst the plants.ps! I am still waiting for my makerbot to arrive so I have not printed/tested my design yet.