Product Material: Selected 304 high-quality steel, rust resistance, durable Size: 34*24.5*7 Suitable for 250mm pipe Features: 1. Selected thickened 304 stainless steel, thickened and hardened and then polished, high-temperature resistant and rust-free, smooth edges, no burrs 2. Embedded installation, fixed clips do not fall off 3. Clip fixing, adjustable tension relaxation Easy to Install: The bottom has a number of triangular ring buttons, directly into the tube can be set Function:Used to convey or discharge air and moisture into indoor space to maintain air quality and ventilation. Applicable Fields:Suitable for bathrooms, houses, offices, garages, workshops, attics, etc. 10"Inch Stainless Steel Universal Round Louvered Vent Cover with Built-in a Fly Screen for House,Office,Bathroom,Garage Ventilation