... synthetic oil. Specification: Type:Worm Gear ReducerModel:Center Distance:25,30,40,50,63,75,90,110,130Ratio:5,7.5 ... ,10,15,20,25,30,40,50,60,80,100Color:Blue/Silver WhiteMaterial:Aluminium ... 56-62HRCShaft-chromium steel-45Packing:Carton box/per set(With foam board inside)Bearing:Brand "NSK" BearingSeal:NAK Seal from TAIWANWarranty:1 ...