Amarine-made 4" Stainless Steel Wall Air Vent Bull Nose Bathroom Extractor Outlet Grille Louvres new stainless bull nose wall vent with anti insect grill, louvres, retainer clip this stylish steel wall extractor vent outlet has a fine mesh to keep pests out and a weather seal t ideal for all tumble dryer vent pipes / hoses, bathroom vents & extractors, air conditioning units,