Set of two silo wagons, type Uas / Raj, of the Czechoslovakian State Railways. The models feature many applied plug-in parts, some in perforated design, along with free-standing grab rails, railings, ladders, and tubes. They include perforated walkways and are fully equipped, suitable for block trains.

The Uacs 451.1 type was developed in response to the increasing demand for transporting powdered materials, particularly cement, in the late 1950s. These wagons were owned by cement and lime manufacturers and registered in the ČSD fleet as P-wagons, indicating private owner wagons.