Diameter: about 2.7cm, suitable for most beverage bottles. Gift: A perfect gift choice for your family, friends or colleagues, they will like them very much. Small hole design Uniform water outlet, easy water outlet, suitable for smoothly watering seedlings, young plants and leaves. Easy to install like a normal sprinkler, you can easily attach it to a sprinkler without any effort. Simple installation: Effortlessly attach the sprinkler to any standard like a regular hose, requiring no complex installation procedures. Random color