This is a half circle spray whose spray-head is directable. This means that you can push the spike in the ground according to the lay of the hose, then swivel the spray-head to where you want it. Used up against a fence or near the edge of a border. This is a “barbed fitting” which means that the ½ inch (13mm) hoseline or Polytube fits directly to the spray – no need for connectors.  Up to 3 per hose-line. Also see: Timers, Connectors, Polytube, Height extension.