The function of this product is to show the water level and remind you to water when there is no water. Convenient to use, the water level meter use process is very convenient. Its use is also very wide, suitable for all kinds of flowerpots. Features - ColorWhite - Material: Plastic - 150# Size: About 20.00X2.00X2.00cm/7.86X0.79X0.79in - 120# Size: About 16.50X2.00X2.00cm/6.48X0.79X0.79in - Made of plastic which features with stability and durability, very hard and smooth for durable usage. - Water shortage alert : water level meter is simple and convenient to use. - Suitable for different occasions: suitable for farmland, garden, indoor planting, greenhouse planting, etc. - Practical reminder function: can show the water level, can remind you to water when there is no water. - Easy to use: Water level gauges are easy to use and a difference to your garden life. Package list: 2 Level Indicators (150#) 2 Level Indicators (120#)