This pack provides  a full circle spray at 275mm (11 inches) above ground which raises the spray above surrounding plants. 

The diameter of spray is adjustable up to 6 metres.   Simply unscew the sprayhead from the spike body.  Screw the Extension Tube onto the body, then screw the sprayhead to the top of the tube.  

This works with all Garden Magic styles of Spike Spray.  By adding different Height Extension Tubes, any height of spray may be obtained.