Pressure compensating dripper with a turbulent flow path Maintains a constant and uniform drip rate of 4 LPH even when used on sloping ground Made from tough UV stable plastic. Install in line with 13mm Supply Tube / end of line with 4mm Micro Tube Perfect for hanging baskets, troughs, growbags borders, greenhouses, cloches, vegetable gardens Use at the base of small plants, secure with a stake.