Genuine OEM HP LaserJet Pro 300 Color M351a Toners

The M351a offers a black-toner capacity choice. HP 305A black is standard-yield, while HP 305X black is high-yield. The three color cartridges remain HP 305A, so choosing more black toner doesn't change what you use for cyan, magenta, and yellow.

Toner Buzz carries genuine HP 305A and 305X cartridges individually. The all-305A four-color set includes one of each color; the 305X/305A bundle pairs two black cartridges with the three colors, useful when black toner is the supply you go through faster.