This is a plastic building kit and assembly is required

Smooth Running Motor

Model Number: 931-1615

Trainz Product Id: 12011867

Athearn G97217 HO Union Pacific 4-6-6-4 Challenger Oil Tender #3985 ProductID_11640052 This is a plastic buildingThis is an Athearn G97217 HO Scale Union Pacific 4 6 6 4 Challenger Oil Tender #3985. Key Features: Boiler backhead with printed manual controls,Individually applied piping, valves, generators, etc.,Correctly operating eccentric cranks,Adjustable cab windows,Headlights and number boards with directional light change,Tender light,Genesis Five pole, skewed armature motor with two flywheels,Pivoting front and rear engines for negotiating 18 radius