Hp 301 Ink Cartridge

[1581960]

I've been looking online for HP301 ink cartridges but I'm confused about the part numbers, black ones have part numbers CH561E or CH561EE, colour CH562E or CH562EE. Does anyone know what the additional 'E' represents?

[Buenchico]

It probably has no real significance. Manufacturers often update part numbers simply because of (for example) a change in packaging.

CartridgeSave (who're a well-respected supplier) use both part numbers here:
https://www.cartridgesave.co.uk/CH561EE.html

If you're still in doubt though, use the numbers that appear on HP's own website:
Black: CH561EE
Tri-colour: CH562EE
Black High Yield: CH563EE
Tri-Colour High Yield: CH564EE

http://store.hp.com/UKStore/Merch/Supplies.aspx#!q=HP%20301%20Ink&type=cartridge

[1581960]

Very helpful (as always) Buenchico, many thanks.