The ventilation grilles are made of stainless steel and are suitable for both exust and supply air. Fixed slats prevent rain from entering. The integrated stainless steel grille effectively isolates debris and dust, prevents pests from entering the room and avoids blocking the passage. For indoor or outdoor use, designed to cover openings and vents in walls or ceilings. Quick and easy assembly - use nails or screws to hold it in the pre-drilled screw holes. Wear gloves when installing! The edges of the stainless steel winds are srp, please be careful! Practical design: stainless steel air outlet with 45 oblique louvers, waterproof and rustproof; a built-in screen at the air outlet can prevent uninvited guests from entering the house. Easy installation: it can be easily installed on the ceiling or wall to meet your needs; the louver grille cover is installed on the outer wall to maintain indoor air circulation, and installed on the air outlet in the corridor to save space. RELIABLE MATERIAL: Made of high-quality stainless steel, this wall-mounted wind is sturdy, rust-proof and s a long service life; Fine workmanship and simple style, suitable for different home decorations. Versatile Use: The ventilation hoods can be used to exust indoor air and are ideal for bathroom vents, exust fans, air conditioning units, kitchen fans, gas vents and most other wall vents.