The metal mesh cover is mainly used to prevent large foreign objects from entering the fan, leading to accidents. lt ismainly made of iron wire with multiple surface treatments or stainless steel with electrolytic treatment, and has conventional colors such as black and silvery white. Metal wire mesh cover, after copper plating, nickel plating and chromiumplating, can meet the requirements of salt spray for 8 hours without corrosion: Ater electrolytic treatment, stainless steelcan withstand salt spray for more than 72 hours. The solderjoint can withstand 88 pounds tensile test, and the protectiongrade is IP20. There are many specifications to choose from.