I´ve spent several hours on bricklink now trying to identify this mystery piece. It doesn´t have a part number on it, only the Lego logo. It looks kind of like a hinge or something that might snap into a doorway, but I haven´t found anything similar. Can you help me?
This is part 4218 Garage Roller Door Section without Handle:
As you might imagine from the name, these can be connected and used for garage doors as seen in Century Skyway, for example: