Below you can see thumbnails of some of my favourite PBR and SBSAR files for use in Substance Painter. All of the textures are 2048x2048 pixels and have been checked and validated several times over in Substance Designer and Substance Painter.
To use any of the Substance Painter materials you simply drag and drop them into Substance Painter and select BaseMaterial from the dropdown menu. That's it, you are good to go.
If you would like to take a closer look at the materials listed below, just click on any of the thumbnails to bring up a larger interactive view.