This product is a computer PC fan grill protection cover designed for 90mm case fans or 90mm CPU fans. With a metal wire mesh design, it can prevent dust, debris and other substances from entering the fan or CPU cooler, thereby prolonging their service life.Features:Metal construction, four holes fixing, durable used.Suitable for standard 90mm computer PC cooling fan.They are also a perfect replacement for stock case grills as they are very restrictive and these grills will let air flow freely.Specifications:Product Name: Cooling Fan Guard GrillMaterial: MetalColor: Silver ToneFit for: 90mm FanNet Weight: 306g/10.8ozTotal Size: 9 x 9cm/3.6" x 3.6"(L*W)Package Content: 15 x Cooling Fan Guard GrillNotes:1.Please check the size of you PC fan before ordering.2.Require mounting screws (not included), please prepare screws.3.Colors in the screen may not accurately reflect the true color due to individual computer monitors differences.4.Due to the different measure ways or tools, there may exist slight deviation (ranged at 1-3cm), hope you don't mind.