This features a plastic shell

Here is a Micro-Trains 99301590 N Scale ATSF Heavyweight Passenger Cars (Set of 5)

Model Number: 81593

each 7-7/8 x 1-3/4"

Here is a Lionel 6-11167 CSX Tank Car and Hopper (Set of 2)

Stewart 4666 HO Southern Pacific Baldwin VO-660 Phase 1 #1022 ProductID_11481623 This features a plastic shellThis is a Stewart 4666 HO Southern Pacific Baldwin VO 660 Phase 1 #1022. Condition: Factory New (C 9) Operational Status: Functional Original Box: Yes (P 9) Manufacturer: Stewart Hobbies Model Number: 4666 Road Name: Southern Pacific (SP) MSRP: $99. 99 Scale Era: HO Scale Model Type: Diesel Loco The Trainz SKU for this item is P12597551. Trainz Product Id: 12597551