Marketing Information: Experience consistently outstanding image quality and long-life system reliability with Lemark 631 Return-Program Monochrome-Laser Imaging Units. Units' unique formula consistently delivers reliable, high-quality results all in an innovative, shake-free print system. Single-use Return Program cartridges should be returned only to Lexmark for remanufacturing or recycling. Use cartridges with compatible devices: Lexmark XM3146, MS632dwe, MS631dw, MX532adwe, MS531dw and MX632adwe.
