... Fan(Brushless DC Fan, DC Fan, Brushless Fan,cooling Fan,cooler,Blower Fan) (40x40x10,40x40x15,40x40x20,50x50x10,60x60x15,60x60x20,60x60x25,80x80x25 ... plus end of lead wire.Material:Frame:UL94V-0 70% P.B.T.+30% F.R.PImpeller:UL94V-0 70 ... % P.B.T.+30% F.R.PBearing system: B----ball bearing ...