This fuser maintenance kit is compatible with MX-M2630, MX-M3050, MX-M3070, MX-M3550, MX-M3570, MX-M4050, MX-M4070, MX-M5050, MX-M5070, MX-609FB, and MX-609LH printers.It helps maintain consistent fusing performance during volume printing and supports of your device.