Quantity 1.  (Photo shows 2 for illustrative purposes only). The full circle standard pop-up covers up to a diameter of 6 metres, which is adjustable.  The water usage is 6L/min and typically 2 can be run from one hose-line.  The photo shows how 2 can be fitted using Threaded Tee and end Bases.  If your water pressure is high you may be able to fit 3 to one irrigation line.  Water pressure pushes up the spray head to a height of 5cm above the lawn. Can be controlled by a timer. 

Use a threaded Tee or End Base (Not included) to connect to the water supply via a hoseline or Polytube.    If just one pop-up on the line then use an end base.  Tee bases are used when continuing the line to the next pop-up.