Metal MaterialRound Wall Vent Outside Cap is made of stainless steel, rust resistant and sturdy structure Size InformationRound Dryer Vent Cover overall dimension measures approx 14.5cmx14.5cmx12cm/5.71inchx5.71inchx4.72inch NOTEPlease measure the size before purchasing and wear gloves during installation Built in Fine MeshThe wall extractor vent has a fine mesh to prevent rodents from entering the house through the exhaust tube ApplicationStainless Steel Air Vent Cover suitable for kitchen fans/vents, tumble dryers exhaust pipes/hoses, bathroom vents and vents, dryer exhaust pipes, heat transfer and home HVAC system Package Includes: 2 Vent Covers Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.