Connection: 1/4-inch barb thread connection, 1/4inch hose, Suitable for 4mm/7mm(Inner/ Outer diameter) tube and PE tubing .360 Degree Adjustable: 8 spray hole and can adjust water flow rate , also for cutting off the water flow.Great for watering potted plants,For agriculture, lawn, garden sprinkler irrigation drip .Full open they will cover a 10 to 12 inch circle. Rotation of the cap allows adjustment of flow and diameter of throw down to a complete shut-off via a ratchet mechanism on the cap and a notch on the base .Making effective use of water:Able to maintain constant when Long laying or pressure fluctuations, irrigation uniformity, slow watering rate allows soil to absorb water more completely in the root zones of plants.Color: blackMaterial: PlasticPackage Contents:300 x drip irrigation emittersOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.