worm gearbox 40/70, 50/80, 60/100, 70/120, 80/135, 100/155, 120/175 and 135/200 Center Distances RATIO:200 through 1800:1 worm gearboxDouble Stage Universal Series Worm ReducerCast Iron Construction with Green Top Coat for standard applications. 40/70, 50/80, 60/100, 70/120, 80/135, 100/155, 120/175 and 135/200 Center Distances 200 through 1800:1 Single Stage Ratios Carbon Steel Solid Output ...