Mesh: 400 Mesh; Hole Diameter: 30 m Wire Diameter: 0.03mm; Size: 610x335mm / 24x13.19 Inch This mesh screen cover is made of 316 stainless steel. It is rust-resistant and corrosion-resistant Dustproof: Hollow mesh screen design can prevent wires from entering the fan without dust entering. It can be used in computers, power supplies, 3D printers, projectors, ventilation, cabinets, and window to prevent dust. Wide Applications: This woven wire mesh is mainly used for dust removal, gas & liquid filtration and other material separation, for screening and filtration in acid-base environment, and for pickling net in electroplating industry. You can also choose the appropriate mesh for filtering beans and powders according to the items you want to filter.