This developer gear kit is compatible with C224, C284, C364, C454, C554, C258, C308, C368, C458, and C558 models.The set includes five units covering part numbers DV214, DV313, and DV512.These gears are designed to restore machine function by replacing worn or damaged components in the developer drive assembly.Installation follows standard service procedures for the specified printer series.This accessory serves as a functional equivalent to maintain operational performance consistent with factory specifications.