Air vent grille made of 304 stainless steel, thickened, not easy to deform and not rust. 100mm hemispherical hood design, windproof and rainproof, very easy to install and use, compatible with all 4 inch diameter ducts. This stylish steel wall extractor outlet features a fine mesh to keep insects out and a weather seal to prevent leaks and unwanted drafts. The interior design is shaped like a grid and is inclined at 45° to prevent rainwater from entering the pipeline. Ideal for all bathroom fans and extractors, kitchen fans and fans, range hood extractors, as well as a wide variety of industrial uses. Features: Material: 304 Stainless Steel Circular Pipe/Hose Connector Diameter: 100mm (4") Weight: 110g Product Size: 14 x 9x 4 cm Products Included: 1pc/2pcs x Stainless Steel Air Vent Grille Ideal use for: All tumble dryer ventilation pipes Bathroom pipes, vents and extractors Air conditioning units Kitchen fans and vents All wall vents Heat transfer and ventilation systems Gas and