Model Compatibility: Fits GK420D and GX420D barcode label printers as specified in the title.
Part Identification: Replaces platen roller, buckle, and gear assembly with part number 105934-035.
Functional Purpose: Restores platen roller, buckle, and gear functionality for proper label feeding and printing.
Component Set: Includes platen roller, buckle, and gear as a coordinated replacement set for the specified printer models.
Installation Scope: Designed for direct replacement of the existing platen roller, buckle, and gear in compatible GK420D and GX420D units.