Model Compatibility: Fits M6500, M6550, M6600, M6502, M6506, M6507, M6552, M6557, and M6607 scanner units as specified in the title. Part Number Match: Replaces part numbers 301022338001 and 301022669001 for the scanner cover hinge function. Functionality: Restores scanner cover hinge without altering design or mechanical behavior. Design Purpose: Serves as a functional replacement for the scanner cover hinge component. Installation Scope: Intended for use only on devices listed in the title and requires no modification to existing hardware.