This is one set of four sideframes based on the design found on Canadian diesels such as the sw1200rs as well as CN's lightweight GP9 series. The wheelbase is a scale 8'-0".
These sideframes are designed as a flat part. They are not designed to fit a particular manufacturer's truck and the modeller will need to develop their own mount solution to install the sideframes. To accomodate axle ends, the inside face of each journal is bored out.