This NDS pop-up drainage emitter (Lowe's #16168, Model# L422RTL) measures 6" x 6" x 6" and is designed to automatically open and release water when drainage flow is active, then close when flow stops to prevent debris, rodents, and pests from entering the drainage pipe. Connects to standard drainage pipe systems and is ideal for French drains, downspout extensions, and yard drainage. Includes one emitter. Like new in original packaging with no damage reported.