... Reducer Worm Gearbox Reducer 2.Model:RV030,Ratio:7.5-100 NMRV030 Ratio 1:7.5-1:100 Aluminium Double Extension Worm Shaft with ... excellent quality(2) Reasonable price(3) Promise to delivery on time(4) Large output torque(5) Safe,reliable, economical and durable(6 ... be tested before sendingSpecifiction: Type:Worm Gear Speed ReducerModel:NMRV030Ratio:7.5,10,15,20,25,30,40,50,60,80,110Color ...