Genuine OEM Canon PIXMA iP4300 Ink and Supplies
The iP4300 has two different black inks: PGI-5 pigment black and CLI-8 black. The CLI-8 four-color pack covers CLI black with cyan, magenta and yellow, so choose the PGI-5 single or twin pack when pigment black is what you need.
Toner Buzz carries genuine Canon PGI-5 black and CLI-8 inks individually and in packs. The CLI-8 color pack groups just cyan, magenta and yellow; the PGI-5 twin gives you a second pigment-black tank to keep as a spare.