[DUST FILTER SIZE:] 4.7 X 1.7 X 0.1 inch/120 x 120 x 3 mm, filters are strong enough and easy installation, Sufficient quantity for daily cleaning and replacement; [MATERIAL:]Ventilation net is aluminum alloy and Vent Filter is stainless steel wire mesh. Ultra fine Mesh filter provides great dust reduction properties;it can provide efficient dust reduction properties, protect you computer from overheating; [Compatible:]Compatible with: Most of Standard 120mm Fan / Vent (Mount Hole Distance: 105 x 105mm); [EASY TO INSTALL:]Easy installation, Computer fan filters can help you keep your computer and computer parts clean, reduce fan noise and prolong the life of your fan; [WIDE APPLICATION:]It suitable for home computer chassis fan dust, speaker speaker grilles and a variety of electrical and electronic products speakers dust protection. Colour:Black Material:Aluminum alloy + stainless steel Size:120x120x3mm Package Contents: 4 * Fan Filter Grills with Screws (The style and color of the screws are randomly sent,Not accept the designation) Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.