These could be camping trailers or old-fashioned house trailers

This is Bachmann 15005 HO Delaware & Hudson 40' Steam Era Box Car

This is a Bar Mills 722 HO Scale Revelia's Shipping & Storage Laser-Cut Wood Kit

Add some light action to your layout

and fault lines

MTH 10-2126 No. 515 Standard Gauge Tank Car DwDetails-10.00-9.00-40.30-8.00-6.30-4 These could be camping trailersThis car features a stamped steel body and chassis, metal wheels and axles, operating metal latch couplers, baked enamel finish, brass trim, and measures 14 3 4 inches long. Operates On STD 42 Curves. Condition: Factory New (C 9) Operational Status: Functional Original Box: Yes (P 9) Manufacturer: MTH Model Number: 10 2126 Road Name: Sunoco (SUNX) Scale Era: Std Gauge Modern Model Type: Freight Cars The Trainz SKU for this item is P11407038. Trainz