It is pecifically designed for terminating your extract duct to an external wall, featuring louvered blades that effectively reduce the impact of wind and rain. It includes an insect mesh to keep pests out and is incredibly easy to install, with a simple push-fit design for ducts and fittings. Additionally, it's UV protected to prevent discoloration, making it an ideal choice for bathroom or kitchen extractor fan vents, hydroponics fans, or in-line extract fans, ensuring durability and reliability in various environments.