Usage: Rotate the green cover on the top of the dripper to adjust the outlet and flow status. Rotate left to close, rotate right to adjust the drip rate and spray pattern to meet different watering needs. The dropper can be removed and cleaned. Size and material: The adjustable irrigation drippers are compatible with 4mm or 7mm drip tubes. Each dripper is approximately 13.5 cm (5.3 inches) tall. Made of durable plastic material for long service life and resistance to breakage. Adjustable dripper with 8 holes: The top of the dripper features 8 outlets that allow flow adjustment to suit different plant requirements. Provides 360-degree water distribution for full coverage. Multiple uses: The bottom of the dripper is designed with a sharp tip for easy insertion into tubing. Suitable for garden plants, potted plants, landscaping, flower beds, vegetable gardens, herb gardens, greenhouses, orchards, lawns, and other plants. Quantity: Each package includes a sufficient number of adjustable irrigation drippers to meet your needs. Ideal for creating a small-scale irrigation system in your garden to efficiently water your plants.