This is a Compatible Lexmark X644X11A Extra High Yield Black Laser Toner Cartridge guaranteed to perform with Lexmark Laser Printers. It replaces the original Lexmark X644X11A Laser Toner Cartridge. This high yield X644X11A replaces the Lexmark X644X11A and X644X21A, which are compatible with the X644e, X646e, X646dte, and X646ef Series Printers. These cartridges are basically the same cartridges with different yields. The X644X11A has an average cartridge yield of 32,000 pages. The compatible replacement X644X11A Laser Toner Cartridges and supplies (also known as generic) are specially engineered to meet the highest standards of quality, reliability and exceptional yields that meet or exceed OEM (Original Equipment Manufacturer) standards for the X644X11A and offer high-quality printing results. Containing new parts including OPC drums, wiper blades, and other internal parts, they are an economical alternative to expensive OEM X644X11A Lexmark Laser Toner Cartridges and supplies, and offer big savings over brand-name X644X11A Laser Toner Cartridges and supplies for your Lexmark X644e, X646e, X646dte, and X646ef Series Printer. The use of compatible replacement Laser Toner Cartridges and supplies does not void Printer Warranty.We offer a 100% Quality Satisfaction Guarantee on our Compatible X644X11A Laser Toner Cartridges and supplies. For use in the following printers: Lexmark X644 & X646 . 4inkjets is the exclusive reseller of LD Products brand of high quality printing supplies on Amazon.