The Hewlett Packard CF237X toner cartridge is a high capacity unit that offers the user a very low cost per page. Compatible with fine printers like the HP Enterprise Flow MFP M632z, this HP 37X represents the very finest black and white prints on the market. Offering an estimated 25,000 prints, each of these genuine Hewlett Packard CF237X toner cartridges are great value. Although the HP 37X is one of the most reliable printing products on the market, Hewlett Packard still offer a full guarantee on the cartridge directly.