2 Pack- Compatible (Alternative for HP 51X (Q7551X) Toner CTG, Black, 13K Yield EP-T126210, REMAN InkJet Ctg, Black, 11.7ML About this item: 1- All toner cartridges and Drums have a 100% Satisfaction guarantee. Print more and pay less based on 5% coverage. 2- It was precisely designed to deliver clear and crisp printing results to satisfy your needs. A perfect partner with your printer. 3- These products go through rigorous testing and quality control to ensure the highest level of quality and reliability. 4- Cartridge People compatible Toner cartridges and Drums are ISO 9001 quality assurance and ISO 14001 environmental management certified. They are excellent economical alternatives to the high-cost OEM toner.