Product s Irrigation detail - Dimensions H x W x D: approx. 18 x 5.4 x 5.4 cm - Inner diameter: approx.4.3 cm - Material: ceramic - Color: terracotta 1.?Made of Terracotta ?Slow Release Water Automatically: The plant watering device is made from terracotta clay, which is a little fragile due to its property. The terracotta watering spikes will release water automatically. Thinner the spikes, faster the draining speed. Therefore, you may still find the spikes broken when you receive it. Do not worry. We take full responsibility for that.nbsp; 2.?Easy to Use with Long Neck Wine or Plastic Bottles? Firstly, dig a hole in the soil. Secondly, insert the watering stakes into the soil gently. Fill the bottle or wine bottles with water, connect the bottle with stakes and turn upside down. Insert 7/8 part of the stakes into the soil to ensure better releasing effect. More stakes in the soil, more water is absorbed by the soil. Notice: For heavy bottles, you need to insert almost the whole stakes into soil so that the stakes will not break. 3.?Economic Choice of 6 Pack Plant Watering Stakes?The package includes 6 watering stakes which is the best price set of plant watering spikes. The size of one spike is 6.3 long and the weight for one spike is 3.52 oz. You could choose used wine bottles or long neck plastic bottles to be compatible with the stakes. The watering spike is a perfect tool for you to recycle the used bottles and free up labor at the same time. 4.?Slow Release Watering Stakes for Vacation Use? There is no standard releasing time for the spikes. Usually 1 Litre of water could water about 7-10 days. The releasing speed of the plant watering stakes depends on the size of pot, soil composition, the need of plants and the climate. It is designed to prevent overwatering and guarantee the watering when people go out for vacation. Please test the releasing speed of the plant waterer before you go out to protect your plants life. 5.? IDEAL FOR FREQUENT TRAVELERS?: With these self-watering stakes, you wont need a Plant Nanny Plan your next trip with a peace of mind knowing that your plants will be left in good care with the Modern Innovations Self-Watering Stakes.