I bought this to create a bug barrier in a roof vent stack, and I think it works perfectly. The small holes should keep out the big roaches -- my concern -- without blocking the flow of air. The mesh is flexible enough to work with, but be aware that it is not a welded mesh, and so strands can come off the edges if you're not careful.
Premium Quality 304 Stainless Steel Mesh Roll - 80 Mesh, 0.18Mm Hole, 11.8 X 39.4 Inch - Ideal For Filtration And Screening
7 Review
Stainless Steel Wire Mesh Sheet: 5 Mesh, 11.8"X23.6" For Durable DIY Projects
6 Review
Set Of 2 MAPORCH Stainless Steel Mesh Screens - 120 Wire, 11.4"X 23.6" (29Cm X 60Cm), Woven Metal Mesh For Ventilation, Doors, Showers, Drains And Cabinets
4 Review
Fine Mesh Filtration Screen Cloth Roll - 304 Stainless Steel Woven Wire 120 Mesh With 0.125Mm Aperture, 11.8 X 39.4 Inch (30Cm X 100Cm) Size - Ideal For Filtering Applications
7 Review