The 4PK (1 black, 1 magenta, 2 yellow) CE400A, CE402A, and CE403A toners. High-quality product compatible with HP Laser printers, specifically the HP 507A LaserJet Pro 500 Color M551dn and M575DN models. This toner set includes yellow, magenta, and black cartridges, with a page yield of 6,000 pages for color prints and 5,500 for black prints. Manufactured by a trusted brand, this toner set is covered by a 3-year warranty designed to provide reliable, professional-quality printing results. It is compatible with various HP printers and offers a convenient solution for maintaining your printing needs.