... Gearbox Reducer 2.Model:RV030,Ratio:7.5-100 NMRV030 Ratio 1:7.5-1:100 Aluminium Double Extension ... to delivery on time(4) Large output torque(5) Safe,reliable, economical and durable(6) Stable ... transmission, quiet operation(7) High heat-radiating efficiency, high carrying ability(8 ... sendingSpecifiction: Type:Worm Gear Speed ReducerModel:NMRV030Ratio:7.5,10,15,20,25,30,40,50,60 ...