Feature: The Plant self watering devices support most common plastic bottles which have an inner diameter of 1.1 inch, like 20 ounce Pepsi, Coke, Dasani water, and Lipton iced tea, Dr.pepper, Lipton, Deet Coke, Coca Cola, Pepsi, Aqufina,Clear American,Soda water bottles or other 1.1-inch inner diameter bottles Keeping your plant properly watered: Different types of plants require different amounts of water.With our automatic plant watering system with adjustable valve you can easily calculate how much water to drip for your plants. rate control:plant watering device with control valve can control drip speed 0-60s / 1 drip, slow release drip for 1-15 days Effectively recycle:use plastic bottles, made of ABS plastic. It can be repeated and applied to reduce unnecessary expenses Simple and convenient, no need for any cumbersome installation, just drill some holes in the bottom of the bottle or cut the tail of the bottle Product Efficiency: This water spikes machine is a product that automatically regulates watering time for those who go out for holiday or have no time to care for flowers. Widely Application: Fits for use with potted plants, houseplants, patio plants, hanging baskets, desk pots, hanging plants and outdoor gardens. Specification: Type: Watering Spikes Material: Plastic Color:Blue/Green Quantity: 1Pcs Note: Please allow minor deviation due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package Included:(can choose) 1 x Watering Spikes