Snap in installation for spacing to meet your requirements. Pressure compensating for a constant discharge between 8-60 psi. One of the best performing pressure-compensating emitters available. Unique design uses a diaphragm, which allows the emitter to self-flush and inhibits back siphoning. Will not drain below 2-3 psi, preventing complete drainage, reducing start-up time and improving uniformity. Barbed inlet for installation directly into tubing or 1/4" feeder line. Male adapter design also can be used with 1/4" exit tubing and acts as a bug shield, deterring the entry of insects. Black. Priced per bag of 100.