Consistent with an embodiment of the present invention, there is a device for transferring a substantially disc-shaped workpiece from a workpiece carrier. Vertically adjoining ones of the display units respectively have adjoining portions which are offset thicknesswise from each other for prevention of contact between the plasma tubes of the vertically adjoining display units. The resultant blends manifest unexpected compatibility characteristics, increased tensile strength, and improved process characteristics, e. The distance between the two stoppers of the two anti-mismating elements is smaller than that between the two inclined guides and equals the width of the smaller sized plug connector. The request comprises the identifier and account identification information associated with the customer account.