High Quality Material: This computer fan filter grill is made of the PVC and magnet, which is soft and durable, easy to clean and do not rust. Size Information: The PC fan dust filter size is 120mm x 120mm x 0.45mm, the mesh holes diameter approx. 0.8mm. Excellent Dust Resistance: The fan filter provide great dust reduction properties, which is great to keep your computer fans and computer parts clean. Using this filter can reduce the dust and hair getting in cooler fans. Magnetic Design: The pc fan filter use the magnetic frame design which is easy installation and removal. What You Get: Come with 5 pcs 120mm x 120mm black computer fan filter grills. In addition to the PC, please use it for products that require a dust filter or cover such as a speaker grill.