Carrot's compatible laser toner cartridges and supplies for Lexmark T634 are designed to offer the best print performance, dependability and consistent yields that meet or surpass Lexmark OEM (Original Equipment Manufacturer) specifications for the Lexmark T634 and offer high-quality output. These compatible toners are brand new and are a smart alternative to high-cost OEM Lexmark laser toner cartridges and supplies, offering substantial savings over the brand-name laser toner cartridges and supplies. Using compatible replacement laser toner cartridges and supplies for your Lexmark T634 will not void your printer warranty. Carrot Ink guarantees 100% satisfaction on quality T634 laser-toner cartridges and printing supplies.