HP Backplate Guide Duck (935306-001) is a named part for the HP Engage One family. It is listed specifically for the HP Engage One 145 AiO Touch, making its role clear as a model-specific backplate guide component.
The part number is 935306-001. Use this identification when matching the guide component to the listed Engage One equipment or recording it as a replacement part. The available product information confirms the item name and model association; it does not specify material, dimensions, fasteners or package contents.