The ventilation duct cover is designed for indoor exhaust purposes and reducing noise levels. It is a great option for use with bathroom vents, exhaust fans, air conditioner units, kitchen fans, gas vents, and various other wall vents.SpecificationMaterial: Stainless SteelTotal Size: 208 x 59 mm / 8 x 2.4 inch (Dia.*H)Opening Dia.: 180mm / 7 inchApplicable Range: 175-187mm / 6.9-7.4 inchCompatible for 7 inch duct or wall hole and the ceiling holePacking List: 1 Pcs x Round Vent Covers (Included Screws and Expansion Tubes)AdvantageStainless steel with increased thickness for enhanced durability and improved rust resistance. The surface is coated in stainless steel and anti-oxidation, providing an attractive appearance and additional protection against rust. Compared with other traditional products, our design with the widened ventilation shutters can prevent smoke exhaust re-flow.InstructionThis stylish steel dryer exhaust vent outlet features a fine, high density mesh that provides good protection and a weather seal to avoid any undesired leaks or drafts.NoticeEnsure proper size and compatibility with wall mounting hole size before installation. Regularly inspect and clean the vent to maintain optimal performance.