These are SSL 4000, 8000 and 9000j Console Audio Knobs series, the native format is blender but you can download as FBX(zip), DAE,STL, OBJ and MTL as well. These are one of my first jobs with modeling in Blender, I have done it because I am working with audio plugins GUI design and want to share someone else who is a passionate designer like me :)

Some Formats are not applied with modifiers which is only a Subdivision Surface, so you need to apply this one to the other formats objects.

Have more like this just contact me

Please share and Enjoy it!