The Hozelock advanced pressure compensating drippers are for use in-line and always give 4 Lhr water flow regardless of their position in the system The drippers are made from tough UV stable plastic and have an in-built filter They automatically self clean and automatically shut off when pressure is below 1 bar Ideal for hanging baskets troughs growbags borders greenhouses cloches and vegetable gardens Use at the base of small plants secure with a stake Pack Quantity 5