Penta Angel 50/100/200 Pcs Adjustable Irrigation Sprinklers Watering Drippers Sprinklers Emitter Drip System On 1/4" Barb (50) Adjustable Irrigation Drippers Sprinklers Emitter Drip System,Automatic cleaning, the starting water erosion flow channel, anti-clogging performance. Has a 1/4-inch barb thread connection,Great for watering potted plants Suitable for 4mm/ 7mm(Inner/ Outer diameter) tube. Able to Maintain constant when Long laying or pressure fluctuations, irrigation uniformity Full open they will cover a 10 to 12 inch circle. Color: Black and Red Material: Plastic