HP 78A Black Original LaserJet Toner Cartridge (CE278A), HP 78A Economy Black Original LaserJet Toner Cartridge (CE278L). HP 78A LaserJet Toner Cartridge Dual Packs let you print more and save more. Get professional print quality for a better value than individual cartridges. Stay productive and reduce downtime by keeping an extra toner cartridge on hand. Enjoy printing with striking blacks, shading and graphics, thanks to the premium print quality. There are 2 cartridges in the package, so you can double the time before you have to order more toner. The CE278AD yields up to 2100 pages. Compatible printers: HP LaserJet Pro M1536dnf, HP LaserJet Pro P1566, HP LaserJet Pro P1606DN, HP LaserJet Pro P1607dn, HP LaserJet Pro P1608dn, HP LaserJet Pro P1609dn.