Protect larger air brick openings with the MouseMesh XL Air Brick Cover. Measuring 305mm x 305mm (12″ x 12″), this heavy-duty cover features a fire-retardant PVC frame and stainless steel woven mesh with 0.9mm wire thickness and a 2.5mm aperture, offering superior strength and long-lasting pest protection. The durable mesh helps guard against a wide range of intruders – from mice and rats to wasps, slugs, and cockroaches – without disrupting airflow. To ensure maximum stability and support, the XL cover is best installed using screws (included), but it can also be fixed with adhesive if preferred. Please note: screw hole caps are not included should you choose the adhesive method. Available in black only.