Pressure Compensating Drippers give a reliable 2 litres of water per hour. Barbed for direct attachment to micro supply tube and inserted directly into the main supply hose . Just punch a hole into your 13mm supply tube then push the nozzle in. Or push into the end of your 4mm supply tube and fix to a stake. Self-flushing (cleaning) action at low pressures. Large clog resistant turbulent flow path. this CETA dripper is able to be taken apart for inspection and cleaning. Insect Baffler to deter insect entry. Applications: Pots, planter boxes, balcony patio and landscape applications.