Motoman SK-6 MRC S-Axis RV Reducer - HW9280631-A. Please note that this is a Teijin Seiki RV20E reducer with a turns ratio of 161:1. It may work for other applications such as positioners or it may fit other robots. It is in excellent used condition with a 180 day warranty. Save over new Motoman pricing. All of our used RV reducers have been purged, re-greased, and tested for wear.