Compatible with the following printer models: 2552ci, 3252ci, 2553ci, 3253ci, 3501i, 4501i, 5501i, 3050ci, 3550ci, 4550ci, and 5550ci. Designed for drum maintenance to support consistent print quality and help prolong the life of the imaging unit. Simple installation and replacement process without requiring special tools for routine maintenance. Helps minimize toner waste and printing inconsistencies by keeping the drum clean. Built to meet function standards for function and consistent results over time.