This fuser unit is a compatible replacement designed for use with Color Pro M253, M254, M278, M280, and M281 printers.It replaces OEM part numbers RM2-2487, RM2-2503, RM2-5583, and RM2-1673.The unit is engineered to work with both 110V and 220V electrical systems, making it suitable for various regional power standards.It includes a fixing assembly that supports consistent print quality and during regular use.This replacement part maintains duplex printing functionality, full compatibility with your printer's features.