Each tree watering bag holds up to 16 gal. of water and slowly releases it over 6 to 9 hours. This ensures deep hydration, directly reaching the tree roots. Ideal for newly transplanted trees or trees in hot summer conditions, providing them with the moisture they need for healthy growth. Made from strong, weather-resistant PVC material, these tree watering rings are designed for long-lasting durability. They are tear-resistant and can withstand damage from tree branches, easily handling the pressure when filled to capacity. The set includes 4 slow release watering bags, ideal for both young saplings and mature trees. Each tree irrigation bag fits trees with a maximum trunk diameter of 5.51 in. and a minimum tree height of 5.91 in. The water inlet features a screw cap for easy opening and filling, with a 1.18 in. diameter large enough to fit most common garden hoses up to 1 in. The drainage outlet uses a slow-release drip valve, ensuring even water distribution without clogging. These watering bags for new trees offer efficient slow-release irrigation, reducing the need for frequent manual watering. By minimizing water waste, they save both water and time, making tree care easier and more cost-effective. Material: Plastic.