These walls are made out of Hydrocal plaster

if not actually inside

a light Mikado that is preserved today in the Baltimore & Ohio Railroad Museum in Baltimore

The Trainz SKU for this item is P11405176

Measures: 60 x 70 x 70 mm

MTH 10-5085 Std. Gauge Yellow & Black Ives 180 Series Pass Car Set (Set of 3) DwDetails-16.40-11.70-24.00-22.00-6.00-1 These walls are made outHere is a MTH 10 5085 Yellow & Black Ives 3 Car Std. Gauge 180 Series Passenger Set. Features: Metal Wheels and Axles Overhead Interior Lighting Colorful, Attractive Paint Schemes Detailed Car Interiors Baked Enamel Finish Brass or Nickel Trim Stamped Steel Body and Chassis Operating Latch Couplers Unit Measures: 20 1 4" x 4 1 8 x 5 7 8 Operates On STD 42 Curves Condition: Factory New (C 9) Operational Status: Functional Original Box: Yes (P 9)