Speedy Inks 4PK Compatible HP 90X CE390X HY Black High-Yield Laser Toner Cartridge for HP LaserJet Enterprise (M4555 / M601 / M602 / M603 Series)

What's included: Four (4) compatible black toner cartridges (HP 90X CE390X HY replacement) from Speedy Inks. Compatibility: Built for use in HP LaserJet Enterprise M4555f, M4555fskm, M4555h, M601n, M601dn, M602n, M602dn, M602x, M603n, M603dn and M603xh printers. Yield and standards: Average cartridge Page Yield*: 24,000 — measured in accordance with ISO-19752. *at 5% coverage (ISO/IEC standard). This product is the high-yield version of the HP compatible 90X toner and provides page counts equivalent to the original HP 90X. Customer support: If you have any concerns or problems with your order, please contact us first so we can resolve it — your satisfaction is important to us.