Product fit and size: Designed for a 4inch diameter pipe and vent opening. Outside face measures 6 x 6 inches. Please confirm these dimensions before installation to ensure proper fit. What it solves: Prevents wind, rain and snow from entering outdoor vents, and blocks birds and rodents from nesting in your ductwork. Keeps outdoor exhaust paths clear and protects interior systems from weather and pests. Lint and debris control: Includes a density mesh to catch small debris and pests. If your dryer lint is unusually large and prone to clogging the mesh, the screen can be removed to reduce accumulation while maintaining the louvered weather protection. Durable construction: Made from impact poly plastic with a UV stabilizer to resist fading and degradation from sunlight exposure. Built for longterm exterior performance without rusting or corroding. Easy installation and : Simple to mount for dryer and bath fan venting. The surface accepts spray paint if you want to match exterior trim; painting will not affect the vent's function or durability. Typical applications Outdoor dryer vent on a singlefamily home or apartment building — protects the dryer exhaust while allowing proper airflow. Exterior bathroom exhaust fan outlet — keeps weather and pests out of the exhaust duct. Replacement or upgrade for an existing 4inch vent cap during home maintenance or remodeling. Notes Confirms fit: Fits a 4inch diameter duct; outside face = 6' x 6'. Verify these measurements before ordering or installing. Mesh option: Leave the density mesh in place for maximum pest and debris protection; remove it if lint buildup becomes a problem.