Useful tools: the self watering probes are simple and effective ways to water your plants when you are on vacation, business trip or forgetting to water them Application: the 16 pack watering stakes are suitable for most automatic garden watering devices; They are good for seeding, planting without pollution; And they will slow to release water into the pot as the plants need Measurement: connect tube is 78 cm/ 30.7 inches in length, the root get water directly by itself to achieve water drip irrigation Kindly reminder: the watering stakes are suitable for watering any indoor plant; Please keep the sink and flower pot at the same level; And the sink is at higher level, which will accelerate the process of drip irrigation How to use: as the soil dries, the ceramic cone delivers water gradually into the surrounding earth; Thereby create a vacuum within the cone which draws water from the nearby container of water; Once the soil is moistened enough, the watering stake will cease flowing water Operation: 1. Put the earthen part of the product into the water to soak for 15 minutes. 2. Prepare a water container filled with water (a narrow bottle such as mineral water bottle). 3. Make sure the pottery pieces filled with water, because the green plastic cover tightly with the pottery pieces. 4. Insert cone piece a little bit into the soil of plant. 5. Then it will automatically bring water into the other end of the container, and then water your plants. Colour: green, white, brown Material: plastic, ceramic Size: 11x3cm Package Contents: 16 x Plant watering devices Tips: 1. In order to water better, please keep the bottle watering device below the high end of the green plastic cover. 2. Please note the demand of each plants and pots size, and use the appropriate watering devices. 3. If it fails to water your plants, please repeat the above operation steps. 4. After months of using, the ceramic piece parts need to be cleaned so as not to affect the effect of continue-using. Only the above package content, other products are not included. Note: Light 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.