Industrial Cooling Fan 12cm AC Fan 2123xsl 220V 12038 Axial Fan. Flame Retardant Material: Wind blades use PBT + 30% glass fiber with VO grade flame retardancy. Corrosion Resistant Frame: Black painted aluminum alloy die-casting ensures anti-corrosion and moisture-proof performance. Low Noise Operation: Equipped with imported oil bearings for quiet and smooth running. High Insulation Resistance: Insulation resistance meets 500 megaohms or more standard. OEM and ODM Services: Offers full customization, minor customization, and design-based customization options. 100% Quality Inspection: All finished products undergo visual and functional inspection before shipment.