This N Scale roof insert is designed to fit the Fine N Scale X31 double door boxcar. Locate the roof using some pins in locator holes on the car, scribe some cut lines, make some cuts, file opening to fit, glue in place. Once complete you will have a unique model of a unique PRR Automobile Boxcar. Fine N Scale double door (fnr-2008) not included.
Installation instructions can be viewed here: https://photos.app.goo.gl/9LF6KpW45qeHedk29