Single size: length 13.3CM, opening outer diameter 3CM, inner diameter about 2.7CM Product material: new material PP Features of the new dripper: The flow rate can be controlled, the plant watering device with control valve can control the dripping speed 0-60s/1 drip, slow release drip lasts 1-15 days Simple and convenient, without any tedious installation, just drill some holes in the bottom of the bottle or cut the end of the bottle Accurate amount of water, provide different amounts of water for different plants and flowers, don't be a plant killer, other waterers either use too little or too much water In some plants the old leaves just turn yellow and drop, but if the new growth is yellow it could be a sign of overwatering or underwater Compatible with branded bottles: Dr.pepper, Pepsi, Coca-Cola, Iced Tea, Lipton, Deet Coke, Aqufina or other 1.1" inner diameter bottles Enjoy your vacation with your family, leave your plants to me, grow your own watering nails for your vegetables, indoor outdoor gardens, everyday aquatic plants, potted plants, houseplants, herbs, garden plants, hanging baskets, table pots, Hanging plants,small trees, shrubs, use switches to control the flow of water, you have the final say on the flow rate Now all you have to do is simply make a hole in the bottom of the bottle to let in air Contains: 12-pack blue-green average