This is a compatible Sharp MX-31NTBA / MX31NTBA black laser toner cartridge guaranteed to perform with your Sharp laser printer. It replaces the original Sharp MX-31NTBA laser toner cartridge. The compatible replacement MX-31NTBA 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 MX-31NTBA and offer high-quality printing results. Manufactured containing 100% new components, they are an economical alternative to expensive OEM MX-31NTBA Sharp laser toner cartridges and supplies, and offer big savings over brand-name MX-31NTBA laser toner cartridges and supplies. The use of compatible replacement laser toner cartridges and supplies does not void your printers warranty.We offer a Two Year 100% Quality Satisfaction Guarantee on our compatible MX-31NTBA laser toner cartridges and supplies. LD © Cartridges are manufactured in an internationally certified ISO 9002 factory. LD © cartridges come with a 100% Two Year money back guarantee and technical support. For use in the following printers: Sharp MX-2600N, MX-3100N