The Trainz SKU for this item is P12325608

primarily the doors

Trainz Product Id: 12100447

Trainz Product Id: 12332410

But you can't use just any kind of sand for any kind of product

State Tool & Die CMA740 HO Spacer Car Kit ProductID_11460220 The Trainz SKU for thisThis is a State Tool & Die CMA740 HO Scale Spacer Car Kit Includes Trucks & Couplers Undecorated Condition: Factory New (C 9) Operational Status: Functional Original Box: Yes (P 9) Manufacturer: State Tool & Die Model Number: CMA740 Road Name: **** No Road Name Scale Era: HO Scale Model Type: Freight Cars The Trainz SKU for this item is P11533261. Trainz Product Id: 11533261