BIGGER 1MM MESH HOLE: 2 pieces 50x50cm magnetic dust filter pc case fans dustproof cover with 1mm holes doesn't restrict airflow and also the white computer fan dust filter can help good ventilation of chassis. DIY MULTIPLE SIZE: 2 pack 500mm 19.68inch pc computer case dust filter mesh cover with 3m 118 inch magnetic strip along, you can diy and build your own dustproof system easily. WIDE APPLICATION: The white computer fan mesh designed for home office pc computer chassis and fan dust filter,speaker grills and other electrical electronic product dust protection or some diy dust proof project such as tower computer dust cover. It also can used be dust cover for gaming consoles, Xbox, Xbox Series X, Xbox One X and more. DUSTPROOF & VENTILATION: Computer cooler fan dust filter mesh can be used instead of the side cover of pc case which effectively increase the ventilation effect and keep device clean to prolong its working life.