Water plants precisely where they need it most-the root zone-with the 4 GPH Take-A-Part Flag Dripper. Waters evenly into the soil, creating good soil moisture plants need for optimal growth and overall health. Ideal for watering individual shrubs, trees & plants in containers and hanging baskets. The color-coded flag identifies the GPH the emitter delivers but does not adjust the water flow; the pull flag makes the dripper easy to grasp and position. Give it a tug and it pulls apart so you can remove debris. The 4 GPH Flag Dripper emits up to 6.30 GPH at 15-50 PSI and is made of polyethylene treated with UV inhibitors.