LD Products offers high-quality, low-cost alternatives to expensive name brand toner cartridges! Our remanufactured replacement toners are specifically designed to work with your HP printer. The remanufactured replacement toner for HP CE400X (HP 507X) high yield black & HP CE400A (HP 507A) black have been rigorously tested to ensure they deliver the same bold print from the first page to the very last. We also carry low-cost original HP supplies. Order from LD Products and take advantage of our industry best 100% satisfaction guarantee!