The plant watering spike made of material plastic,it can help you watering your plants automatic and just deliver the sufficient amount of water a plant needs and to keep the soil moist when you need to go out for a long time or travel.You can control the water flow by the upper hole. Features - ColorAssorted Color - Material: PP. - Size: About 16.5 x 5.5 x 5.5cm. - Automatic watering system,you do not have to worry about that no care of you plant when you from home for a long time. - Made of premium pp material, strong, durable and bright color. - Handy garden watering tools help deliver water where plants need it most. - No need to worry about watering your plant while you are ,this clever device simply attaches to screw-top bottle and dose the watering for you. - You can put water and fertilizer in the bottle at the same time to transport the nutrient solution. - Dear buyer, due to lighting effect, monitor’s brightness, manual measurement, etc., there could be some slight differences in the color and size between the photo and the actual item. Sincerely hope that you can understand! Thank you! Package list: 12 x irrigation emitter