Hunter emitters apply water slowly and directly at the plant to ensure every drop is put to efficient use. They are available in self-piercing barb. The barb models are available in 0.5, 1, 2, 4, and 6 GPH models. This wide range of flow rates offers you the flexibility to give individual plants and trees the right amount of water from a single emitter. They are also color-coded for fast flow identification and feature coined edges for easy gripping during installation.