1、Fine Holes: Ultra fine holes design. Help to keep computer and parts inside clean from dust. Protect computer from overheating. Reduce and minimize fan noise. Extend the lifespan of computer hardware. 2、Function: Ventilation rate of up to 65%, ensuring better heat dissipation than regular filters. It can be used for home computer chassis fan dust filter, speaker grilles and other electrical or electronic products speakers dust guard. 3、Magnetic Fan Filter Mesh: Magnetic fan dust mesh filter for keeping and protecting your computer and electronics parts clean, no need screws, easy and convenient installation. 4、PC Fan Dust Mesh Filter: 120x240mm PVC fan dust filter cover reduce the fan and parts cleaning time, prolong working life, even if filter dirty, easy cleaning and replacement. 5、Easy Install: Convenient magnetic frame design for easy installation. Package included 10pcs magnetic fan dust filters. Made of PVC material, no deformation at high temperature, fire retardant, easy to clean, dust proof and ventilated.