Features PVC construction to seam leakage issues, perfectly fitting 110mm pipes for reliability roof vent pipe rain protecting Complies with national ventilation standards with apertures ratio, ensuring airflows while blocking goggas ideal for basement vent pipes PVC materials 3x longer lifespans than regular, suitable for outdoor chimneys and ducts under sun exposure Covers 50 200mm pipe diameters for residential / commercial ventilation systems, solving irregular pipe matching challenges Enables quick assembly without tool, with 180° adjustable rotation for angles pipe adaptation, Manufacturer: Msioytog