302LV93081 DV-3100 Developer Unit compatible with M3040, 3145, M3540, M3550, M3560, M3645, P3050, P3055, P3060, FS-2100, 4100, 4200, 4300.This developer unit is designed to support proper toner distribution and image development in the specified models.It installs directly into the printer as part of the imaging system and works in conjunction with the photoreceptor and toner cartridge to produce consistent print output.Replacement unit intended for use in maintaining device performance over time.