Features of NMRV series worm-gear speed reducer: 1.occupied little space 2.self locking 3.fast stop ... 4.good cooling effect NMRV series worm-gear speed reducer,such NMRV025, NMRV030 gear reducer, gear speed reducer Features: 1) High quality aluminum alloy die ... Inner packing: CartonOuter packing: Wooden caseYou also can order color for silver, green, and other color8)model number:NMR025,NMRV30,NMRV40 ...