Hewlett Packard LaserJet C4182X Black Print Cartridge with Ultraprecise Toner (C4182X) for LaserJet 8100, LaserJet 8150. The new HP TonerGauge counts pixels to accurately determine how toner is used. It can be viewed via your PC with HP Wed JetAdmin, through the tool tab in your standard printer driver or on the printer front panel display to take the guesswork out of ordering supplies. HP LaserJet C4182 Family Print Cartridges with Ultraprecise Toner are designed for the HP LaserJet 8100/8150 series printers and the HP Mopier 320 to deliver outstanding print quality and a low cost-of-ownership.