Made of high-quality PVC and magnetic strips, soft and durable, easy to clean, dust-proof and ventilated. Size: 140mm * 140mm * 0.45mm/5.51 * 5.51 * 0.02inch, the mesh diameter is about 0.8 mm. Convenient design: easy to install and disassemble, and can be easily placed anywhere on the metal chassis without tools or screws. Performance: Provides excellent dust removal performance, which is very suitable for keeping fans and computers clean and prolonging the service life of computer hardware. Package included: You will get 4 pieces of fan grille black dust-proof net.