Difference between ink

[Sal0111]

Hello

I have an officejet pro 6970 printer and wanted to know what the difference between 902 and 906 ink was? 

It looks like I can use both versions in my printer but what is the difference?

Thanks in Advance! 

[Valsimot]

The 902 black is normal the 906 black is XL only and has higher print yield.

[Sal0111]

They sell 902XL and 906XL

So what is the difference in these two? 

[Valsimot]

Sorry, the 906XL is actually XXL and can print 1500 pages, the 902XL can print 825.

You can find all details here.