Containing many compatible and recycled parts, our remanufactured Lexmark *** is a great alternative to purchasing a genuine Return Program cartridge. This remanufactured Lexmark 78C20C0 unit offers the same 1,400 estimated pages and the toner powder within has been designed to offer comparable print quality too!As ease of use is especially important to our manufacturers, this version of the 78C20C0 is compatible with all the same printer, including the Lexmark CS521dn.  We offer a 100% satisfaction guarantee with this replacement for the Lexmark 78C20C0 and all of our top quality remanufactured products.