With the max speed adjustment set at the maximum speed you want the train to go

Trainz Product Id: 12323218

The Trainz SKU for this item is P12115391

Knuckle couplers

USA Trains R19212B G Chicago & North Western 40 Ft. PS-1 Simulated Steel Box Car ProductID_11571290 With the max speed adjustmentThis is a USA Trains R19212B G Scale Chicago & North Western 40 Ft. PS 1 Simulated Steel Box Car with 8 ft. Panel Superior (Green). Special Features: 1: 29 Scale Model, Three Style of Operating Doors , (A) 6 Ft. Panel Superior , (B) 8 Ft. Panel Superior , (C) 8 Ft. Youngstown , Authentic Operating Side Door Latch, Movable Door Lever, Separately Molded Handrails, Ladders, & Corner Steps, Real Chain on Brake Assembly, See Through Roof Walks & Grates,