Model Compatibility: Compatible with BK ADV400, 500, IR1730i, 1740i, and 1750i printer models as specified in the title.
Part Type: Replacement drum unit intended for use with NPG55, GPR39, and EXV-37 imaging units or image units.
Functional Purpose: Restores drum functionality when installed in supported devices requiring a drum unit component.
Specification Match: Matches the drum unit specifications required by the listed printer and imaging unit model combinations.
Installation Scope: Designed as a direct-fit replacement part for the drum unit position within the stated imaging and image units.