Transparent Gaopeng glass material: Hand-blown glass automatic watering nails allow you to clearly observe changes in the water level inside. It not break or deform during normal use and can be used repeatedly for a long time. Automatic Plant Watering Bulb: Watering bulb keeps plants and flowers moist when you are traveling or busy. The soil slowly absorbs water from the watering bulb, and once the watering system is saturated, the water stops flowing and you no longer have to worry about forgetting to water your plants. Water filling from the top: Unlike traditional plant watering balls, this cactus watering ball has a round hole design on the top, which allows water to be filled from the top, and is equipped with a rubber stopper. For better use, do not the rubber plug into it too hard, otherwise it easily fall in. Note: If the water flow is too fast or the pipe is blocked by soil, you can wrap the water outlet with a permeable cloth. Perfect : The self-watering ball can be used indoors and outdoors, the exquisite design complements the surrounding decoration, it is a gardening tool to keep plants hydrated, and it is the best gift for plant lovers. Colour:transparent multicolor Material:High borosilicate glass Size:about 23cm Package Contents: 4 x Plant Watering Bulbs Only the above package content, other products are not included. Note: Light reflection 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.