Specifications are provided by the manufacturer. Refer to the manufacturer for addional explanations.

• Enjoy the legendary quality and reliability of HP LaserJet printing with the HP 42 LaserJet Toner Cartridge. To ensure consistently outstanding results, interactive HP Smart Printing technology in the HP cartridge and the printer makes automatic adjustments to optimize print quality and enhance reliability. This reliable, easy to use HP cartridge saves time and lowers overall printing costs for an excellent value. (Using genuine HP supplies ensures availability of all HP printing features)
• Enjoy the legendary quality and reliability of HP LaserJet printing. HPs Smart Printing technology and advanced toner formula makes sharp, professional printing easy, reliable and an excellent value.
• HP 42A LaserJet Toner Cartridge, black. Average cartridge yields 10000 standard pages.