Review on 🏢 Hon&Guan 4 Inch Round Air Vent ABS Louver Grille Cover White Soffit Vent with Fly Screen Mesh - Ideal for Bathroom, Office, and Kitchen Ventilation by Pop Henneghan

Advantages: Nice, tidy appearance, built-in pest protection, easy to install. Easy to attach with 3 small flanged stainless steel screws but this product would be perfect if it had 3 countersunk holes and came with 3 stainless steel screws. Thankfully, thanks to the combination of the flexibility of this product's plastic and the small flanged screws I used, they lay almost flush, looked flush, and held it in place nicely. I wouldn't advise pre-drilling the holes because I have a feeling a flange or thumb screw will either go right through or stick to the threads. If you can care less about aesthetics, drill small pilot holes and use three stainless steel pan head screws. In general. For the price and ease of installation. It works, it's safe, and it comes out almost perfect. If you're using small screws (think I used #4 or 6) just make sure you're using stainless steel screws. Testimonial from a licensed MA. an electrician who installed hundreds of exhaust vents.