Mesh: 200 Mesh; Hole Diameter: 74m Wire Diameter: 0.08mm; Size:0.08mm This mesh filter cover is made of 304 stainless steel. It is rust-resistant and corrosion-resistant Dustproof: Hollow mesh filter design can prevent wires from entering the fan without dust entering Wide Applications: This woven wire mesh is good for filtration, dust removal and separation. It can be used in computers, power supplies, 3D printers, projectors, air ventilation, cabinet, window, etc.