These 140mm PC fan dust filters feature a magnetic frame design that allows for quick and effortless installation and removal from your computer case.Constructed from durable PVC material combined with magnets, these filters are soft, long-lasting, easy to clean, and resistant to rust.Each filter measures 140mm x 140mm x 0.45mm with mesh holes approximately 0.8mm in diameter, providing excellent dust reduction properties to protect your computer fans and internal components.The fine mesh effectively blocks dust particles and hair from entering your cooling system, helping maintain optimal airflow and system performance.This package includes 5 black computer fan filter grills, offering versatile applications beyond PC cases, including use as protective covers for speakers and other devices requiring dust filtration.The magnetic mounting system ensures secure attachment while allowing convenient access for regular cleaning and maintenance.