... (2) Reasonable price(3) Promise 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) Certificate of ... be tested before sendingSpecifiction: Type:Worm Gear Speed ReducerModel:NMRV030Ratio:7.5,10,15,20,25,30,40,50,60,80 ...