This type of fan is usually used in computer an other similar machinery. Model: TFS8025  Insulation resistance: more than 10m Ω between housing and plus end wire red color )at 500V DC Dielectric strength: no damage can be found 600v AC.2 secretary, between housing and plus end of lead wire. Material: 　 Frame:UL94V-0 70% P.B.T.+30% F.R.P 　 Impeller:UL94V-0 70% P.B.T.+30% F.R.P Bearing: sleeve or ball bearing. Operating temperature:-10 to℃+℃70 Storage temperature:-40 to℃+℃70 Operating voltage: rated voltage±15%. If you want to know more detail, please do not hesitate to contact us. Currency: USD Payment method: T/T before shipment packing information: 100pcs/ctn