with two parallel sides extending from a loop at one end to a similar loop at the other

Trainz Product Id: 11517731

Here is an RMT 96233 O Gauge Alaska 2-Bay Coal Hopper 2-Pack

The Trainz SKU for this item is P12272392

Lionel 2571 Vintage O 637 Fort Knox Steam Freight Set w/736W,3419,6445,6361,6119 DwDetails-10.70-2.80-24.00-10.00-10.00-1 with two parallel sides extendingHere is a Lionel 2571 637 Fort Knox Steam Freight Set w 736W,3419,6445,6361,6119. Included are the steam locomotive, tender and four freight cars. Condition: Factory New (C 9) Operational Status: Functional Original Box: Yes (P 9) Manufacturer: Lionel Model Number: 2571 Years Manufactured: 1961 1961 Scale Era: O Postwar Model Type: Sets (No Track Trans) The Trainz SKU for this item is P11397726. Trainz Product Id: 11397726