Premium Quality: Made Of 304 Stainless Steel, The Hardness And Anti-Rust Performance Is Better Than 201 Stainless Steel. For Normal Installation, Please Wear A Pair Of Gloves Before Attaching The Cap.Various Sizes: This Style Is A 120 Mm Ventilation Grille. Total Length Is 145Mm, Outer Diameter Is 155Mm, Channel Height Is 40Mm. 4 Sizes In Total (100Mm/120Mm/150Mm/200Mm), Please Measure The Size You Need Before Purchase, So That You Can Buy The Size You Want.Wide Application: Ideal For All Clothes Dryer Vent Pipes, Bathroom Vents And Extractors, Air Conditioners, Kitchen Fans And Vents, All Wall Vents, Heat Transfer And Ventilation Systems, Gas And Electric Clothes Dryers, Range Hoods Vacuum Cleaners As Well As A Variety Of Industrial Applications. A Perfect Replacement For The Old Or Rusty Drain Plug In Your House.Mesh Screen: The Middle Part Has A Mesh Filter Which Can Protect The House From Insects. The Semi-Wrapped Design Cap, Prevents Rain And Wind From Entering The House.Guarantee: We Promise You Top Quality Products. Buy The Essential 304 Stainless Steel Vent Plug In The Ventilation Of Residential Buildings.