Marketing Information: Experience consistently outstanding image quality and long-life system reliability with Lemark MS531/MS631/631 Return-Program Monochrome-Laser Imaging Units/Toner Cartridges. Cartridges' 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.
