Union Pacific Rocket Booster Idler Car 6-Pack Perfect for use with the Lionel rocket booster flatcars or previous versions, this set of idler cars matches prototypes used by Union Pacific to help provide additional braking power and weight distribution. The lead car features newly tooled door openings and clearance arms designed to protect the oversized loads. The six-car set features uniquely numbered cars, each one matched to a car used in buffer service on these special trains. When not needed for special duty, these cars could be returned to your general freight pool just like the prototypes. SKU: 2243150 Dimensions: Length: 13 ½" each Gauge: O Gauge year: 2022 rail line: Union Pacific Minimum Radius: O31 Power: Electric Engine: Diesel Manuals Find the latest manuals in our support section. Replacement Parts Buy any replacement parts in our support section. Contact Contact a service station to fix your product