This product is a set of four black toner cartridges compatible with HP LaserJet P3005, M3027, and M3035 MFP printers. The cartridges have a high yield capacity and are designed to produce high-quality prints with sharp, crisp text and images. The dimensions of each cartridge are 11.81 inches in height, 13.86 inches in length, and 5.71 inches in width. The model number for these cartridges is TCT-HE7551X, and they are compatible with the Q7551X toner cartridge.