Animate your models in minutes with the Walthers Cornerstone Motorizing Kit. This fully assembled drive unit is a drop-in mount for Walthers Double Track Swing Bridge (933-3088), 90′ Turntable Kit (933-3171) and the Walking Beam Oil Pumps in HO (933-3170) or N Scale (933-3248), all sold separately. The Motorizing Kit can easily be adapted to other models. It′s complete with a rugged DC motor and has 360:1 gearing to insure smooth, slow speeds. PLEASE NOTE: This unit is for use with DC power only maximum 12V, .25 amps. Use with Cornerstone structures that accept motorizing 360:1 gear ratio Works on standard DC