Hp ink

[blackfish]

Are HP ink cartridges 21 the same as 56
they look identical and fit in my printer but do not work

[Cakeboy]

No they're not the same or they would have the same numbers. They may well look the same, but they will be for different printers and that's why HP make them differently

[camioneur]

They're the same fit but different size. A 21 is much smaller than a 56 and you often find theseincluded with new printers, you can replace the empty 21 with either but a 56 will last much longer but more expensive. Typically a new 56 is around �10. Don't buy refilled 56's or 57's, they can be rubbish

[camioneur]

So, Mr buttercream brain, you're not that clever then are you, you just gave this guy a completely wrong answer.

Experts,,,I've cr*pped 'em