The Adjustable Spike Mounted Dripper is fully adjustable from 0-40ltrs/hr and should be used with Dripper Line. Simply unscrew the cap one click at a time to produce a drip, dribble or squirt. The Dripper is supplied with a 5mm insert nipple for connecting to LDPE pipe. This drippers adjustability ensures it is suitable for all stages of growth and differing environmental conditions.