We had a problem with spiders in our room and found that they mostly come out of the basement vent. Using some other products (see list below) I made a vent cap that solved the problem. The steel mesh is heat-resistant, the edges prevent sharp edges, and the magnetic strip fits snugly into the air vent and the cutters work easily. Highly recommended. I will definitely be ordering more in the future to cover more vents. com/gp/product/B077M93J18/ref=ppx_od_dt_b_asin_title_s01?ie=UTF8&psc=1Cutter:https://www.amazon.com/gp/product/B00002N5KQ/ref=ppx_od_dt_b_asin_title_s01?ie=UTF8&psc=1Magnetic stripe:https://www . amazon.com/gp/product/B078SVG2CC/ref=ppx_od_dt_b_asin_title_s01?ie=UTF8&psc=1