Usage Tips:Size and material: adjustable irrigation drippers are suitable for 4 mm or 7 mm drip tubes, each is approximately 13.5 cm / 5.3 inches in height; made of plastic material with a long service life, not easy to break. Adjustable dripper with 8 holes: the top of these drippers is designed with 8 plugholes, which can adjust the water flow and control the flow rate according to different plants; with 360 degree coverage, so that the spraying range can be more comprehensive. Usage: rotate the green cover on the top of the dripper to adjust the water output and outlet state, turn left to close the water, turn right to adjust the shape of the water flow, from the drip to the nozzle, to meet your different needs; the dropper can be removed and cleaned. Multiple uses: the bottom of the dripper is and can be easily inserted into the soil; suitable for ground plants, potted plants, landscapings, flower beds, vegetable gardens, herb gardens, greenhouses, orchards, lawns, natural plants, etc. Quantity: each package contains sufficient adjustable irrigation drippers, which can meet your needs; you can use them to create a small water system in your garden to water your plants. Colour: black, green Material: plastic Package Contents: 60 * Adjustable Irrigation Drippers Only the above package content, other products are not included. Note: Light 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.