Brother MFC-J6925DW Super High Yield Black Ink Cartridge (2400 Yield). Brother created INKvestment cartridges to provide larger print volume businesses a budget-friendly solution with 2400 page black cartridges for under $25. INKvestment cartridges provide less than $0.01 black cost per page. All genuine Brother printer supplies are designed as part of an entire printing system and are designed with Brother products in mind to provide a superior degree of quality. Genuine Brother ink is the result of extensive research and development of over 100 different elements.