worm drive reducer 1.Housing:Aluminium Alloy 2.ISO9001 Certificate 3.Model:NMRV40VS,Ratio:7.5 to 100 4.Fast shipping Chinese Aluminum Power Transmission Worm Drive Reducer Specifiction: Type:Worm Gear Speed ReducerModel:NMRV030 VS -110 VSRatio:1:7.5,10,15,20,25,30,40,50,60,80,100Color:Blue/Silver Or On Customer RequestMaterial:Housing: Die-Cast Aluminum AlloyWorm Gear-Copper-10-3#Worm-20CrMn Ti ...