Round Modder's Mesh. Make fan guards, grills, cooling vents, window overlays. Improves airflow and looks great. Round Modder's Mesh is available in 12" x 12" or 12" x 24" size sheets. (24" x 12" has oversize surcharge fee charged at shipping) Round hole design offers(60% airflow)22 gauge perforated plain steel. 5/32" holes 3/16" staggered...