4 Pack 12x12 Inch Wire Mesh, 20 Mesh Stainless Steel Mesh, Never Rust Sturdy Metal Mesh Screen for DIY Projects, Vent, Cage, Garden, Window Screen, Filter Mesh

Perfect fits for vents and flexible.

This was exactly what I needed for my shed vent fan, to keep unwanted things out

Warning, these are super sharp and do not have a hem around the edges, so you need gloves. I installed one of these over my downspout drains over the 5" plastic drain in the ground to discourage raccoons from lifting the drain out and getting into the water, and it's worked so far. I'm considering laying them in the flower bet to discourage cats and squirrels but it would take too many and probably be harmful, so saved the additional wire for potential use up in the eaves where birds and wasps are trying to build nests where the roof areas intersect near the eave rafter vet areas because at the moment I have the sellers cardboard box tapped over those spaces (wink)

Durable.

These were purchased to create a barrier in my terraniums. Sturdy enough to hold back soil yet flexible enough to place in a round container. They can even be trimmed down with a sharp scissors.

Used this to replace air intake mesh on my motorcycle that previous owner had cut out. Looks decent and keeps the down to medium sized debris out of the previous filter area.

Good quality mesh.

Work very well. It has helped us a lot in fixing our screen mesh.