This is a compatible replacement for the Samsung SF-550D3 SF550D3 black laser toner cartridge guaranteed to perform with your Samsung SF-550 or SF-555 laser printer. It replaces the original Samsung SF-550D3 laser toner cartridge. The compatible replacements for the SF-550D3 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 SF550D3 and offer high-quality printing results. Containing new and used parts, including a new smart chip, they are an economical alternatives to expensive OEM SF550D3 Samsung laser toner cartridges and supplies, and offer big savings over brand-name SF-550D3 laser toner cartridges and supplies. While most competitors simply refill the toner cartridge and hope the drum and other key components last we fully disassemble the toner cartridge and rebuild it to ensure the highest quality prints. We directly import these compatible LD Products replacements for SF-550D3 / SF550D3 laser toner cartridges from an ISO-9001 certified factory in Korea just like the genuine Samsung toners. Since we import ourselves we can pass the savings on to you. 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 alternatives to SF-550D3 laser toner cartridges and supplies. For use in the following printers SF Printers SF-555p, SF Printers SF-550, SF Printers SF-550p.