Feature: 1. Tiny Mesh Holes: The PC fan dust filter mesh has tiny mesh holes to filter fine dust, effectively blocking dust and keeping the case clean. Keep the indoor space in better and clean condition. 2. High Breathability: Ventilation rate up to 65%, better heat dissipation. Can be used for computer case fan, speaker mesh cover and other electrical or electronic products dust prevention. 3. Reserved Screw Holes: Precise cutting process and one piece non marking magnetic frame, reserved screw holes for easy installation of non ferrous metal enclosures. For micro curved surfaces, it can also be tightly adhered. 4. Sturdy Nylon Mesh: Nylon PC chassis fan dust filter mesh, high toughness, pressure resistance, support 140mm fan ventilation holes, easy to install, effectively isolate dust and dirt intrusion. 5. Multipurpose: Magnetic case fan dust mesh cover can be applied to the power supply unit in addition to being installed on the case. It can effectively prevent dust from entering while drawing in cool air. Specification: Item Type: PC Fan Dust Filter Mesh Material: Nylon, Soft Magnetic Material Product Size: Approx. 140 x 140mm / 5.5 x 5.5in Applicability: For PC Chassis Power Supply and Fan Ventilation. Package List: 5 x PC Fan Dust Filter Mesh Note: Manual measurement, please allow some errors.