[PARAMETER] Each screen Comes with 4 Screws; Overall Size: 60 x 60 x 0.45 mm / 2.36 x 2.36 x 0.02 inch (L*W*T) [MATERIAL] PVC material Screen are lightweight, flexible and durable. [FEATURE] The mesh holes can not only effectively prevent dust, but also reduce noise. [APPLICATION] Mainly used for dust prevention, such as the home computer case fan, the speaker grilles and other electronic products, etc.. [OPERATION] The computer fan screen come with screws, which is helpful to install.