HJGarden 4PCS 50mm/2" Round Plastic Air Vent Ventilation Furniture Cabinet Closet Invisible Grille Cover Diffuser Ventilation Hole, Black

I bought these round plastic air ventilation inserts for under my furniture, and I’m really happy with them. They fit perfectly and were super easy to install. The airflow is noticeably better now, and they give everything a cleaner, more finished look. Exactly what I needed—highly recommend!

Sealed around the bottom edges of my r.v. with seal tape then used two of these as an air exchange by making a hole in the xoroplast and popping these in. They also are necessary if doing this sealing if there is a water leak you would know (before it all pooled up like a swimming pool). They have smaller air holes that I feel will discourage everything but the smallest bug from getting in. Plastic is thick enough to stay in the hole and not disfigure

These are really nice little vents. You can also paint them different colors if you need to. Exactly what I'm looking for

neat and nicely made

I used these to add ventilation to the storage areas in my camper. Easy to install & seen to help.