Digital BW, The Print

This is a really stupid question but I just have to ask it.

Sometime back I purchased an Epson C86 printer and the MIS EZ B&W inks
to replace the color set that came with the printer. I finally have
enough B&W printing to justify seting up the printer and I pull the
cartridges out of the box and they say to use them in a C84 printer...

I checked the web site and it appears that the C84 & C86 inks may be
the same but before I go and ruin a print head/ink set I would like a
confirmation. Do I have the right inks or did I mess up the order and
forgot to check a box that would have gotten me a cartridge that says
for use in a C86 printer?

Thanks folks,

Jim McMann
San Jose, CA.