Compatibility - Altru Print Fuser Kit works with Part #'s; RM2-6418, RM2-6460 Supports - Color Laser Printer Pro M377, M452, M477 (Duplex Models Only) Features - Altru Print high quality components and printer maintenance experts ensure optimum printer performance Warranty - Extended 6-month replacement warranty and product support from our experienced USA based staff Altru Print Fuser Kit Includes - 1 x RM2-6418 Fuser, 1 x Prepaid Free Core Return Label