centrifugal exhaust fan good quality ,good price,thermal plastic,high speed , lower noise ,CE/UL/RoHS ,customize design ... : 164g. Type bearing: sleeve or ball bearing .Frame and Impeller : Thermal Plastic , UL 94V-0Lead Wires : UL Type( + ) : Red ( - ) : BlackOperation Temperature ... 70oC 35% 85%RHStorage Temperature : -40 80oC 35% 85%RH 120*120*25mm 12V DC cooling fan