Material: plastic.Opening them fully will cover a 10"-12" circle. With 1/4" barb threaded connector, suitable for 4mm/7mm (ID/OD) pipes. It is very suitable for watering potted plants.It can be kept constant over long periods of time or in the event of pressure fluctuations, and irrigation is even. By turning the lid, the flow rate and cast diameter can be adjusted entirely by the ratcheting mechanism on the lid and the notch on the base .
