Size and material: Adjustable irrigation drippers are suitable for 4 mm or 7 mm drip tubes, each approximately 13.5 cm / 5.3 inches in height; made of plastic material with a long service life and durable design. Adjustable dripper with 8 holes: The top of these drippers features 8 outlet holes, allowing adjustment of water flow and control of flow rate for different plants; provides 360-degree coverage for comprehensive spray distribution. Usage: Rotate the green cover on the top of the dripper to adjust water output and outlet pattern; turn left to close, turn right to adjust flow shape from drip to spray, meeting various watering needs; dripper can be removed and cleaned. Multiple uses: The bottom of the dripper is designed for easy insertion into soil; suitable for ground plants, potted plants, landscaping, flower beds, vegetable gardens, herb gardens, greenhouses, orchards, lawns, and natural plants. Quantity: Each package includes 60 adjustable irrigation drippers. Color: Black, green. Material: Plastic. Package contents: 60 x Adjustable Irrigation Drippers. Only the items listed are included; other products are not included. Note: Lighting and display differences may cause slight color variations between the image and actual item. Measurement error allowance is +/- 1-3 cm.