AGPtek 100pcs Micro Adjustable Irrigation Driper Watering Anti-clogging Sprinkler on 1/4" Barb For 0.16" /0.28" (Inner and Outer Diameter) Tube Great for watering potted plants Automatic cleaning, the starting water erosion flow channel, anti-clogging performance Able to maintain constant when Long laying or suffering pressure fluctuations or irrigation uniformity Material: Plastic.Adjustable flow range: 1-70L/h Working pressure: 1-3KG. Weight: 160g