This is a compatible Sharp MX-C40NTB black laser toner cartridge guaranteed to perform with Sharp MX-C311 and MX-C401 laser printer. It replaces the original Sharp MX-C40NTB laser toner cartridge. The compatible replacement MX-C40NTB 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-C40NTB and offer high-quality printing results. Manufactured brand new, containing up to 100% new components, including wiper blades and other internal parts, they are an economical alternative to expensive OEM MX-C40NTB Sharp laser toner cartridges and supplies, and offer big savings over brand-name MX-C40NTB laser toner cartridges and supplies for your Sharp MX-C311 or MX-C401 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 MX-C40NTB laser toner cartridges and supplies.