It measures approximately 30" long

Here is an Athearn 89931 HO RTR CF7 Amtrak #591

Battery controller

Model Number: 14872

Northwest Short Line 210-6 Shay Power Kit for HO, HOn3, HOn2-1/2 & 9 mm Gauges ProductID_11394261 It measures approximately 30" longHere is a powering kit to motorize the Keystone Locomotive Works 20 ton two truck Shay locomotive kit. It fits the KLW kits 105 (HO Scale) or 1053. Condition: Factory New (C 9) Operational Status: Functional Original Box: Yes (P 9) Manufacturer: NWSL Model Number: 210 6 MSRP: $104. 99 Scale Era: Other Scales Model Type: HOn3 The Trainz SKU for this item is P11637644. Trainz Product Id: 11637644