HP 78A (CE278A) Black Toner Cartridge for HP LaserJet Pro M1536 P1606. HP 78A (CE278A) toner cartridges work with: HP LaserJet Pro M1536, P1606. Original HP toner cartridges produce an average of 71% more usable pages than non-HP cartridges. Cartridge yield (approx.): 2,100 pages. 78A toner is designed to work with your HP printer for high quality, reliable results every print. Ensure that your printing is right the first time and every time with HP printer toner: 78A toner. What’s in the box: 1 New Original HP 78A (CE278A) toner cartridge. Color: Black.