These backing plates have been designed to suit the Railtec 9020 Trackside Signs Set B, please see link below.
Complimenting the thin nature of these transfers the backplate plates are half etched brass having a thickness of 0.13mm. There is also a representation of the fixing bars on the rear of the plates.
Not included to complete these signs is 1mm and 0.5mm diameter brass wire and the Trackside Signs themselves.
Please download the instructions from the link below.