[Equilibrium]

i found a printer that is 3.34kg boxed, can i fill the remaing 300gr with paper, to match the shipping weight of the gpu?

No. It needs to be the same weight realistically. What's the odds of a mistake with multiple items. You're banking on the idea a quick one item mistake was made

So the only item that have the same weight (50g difference) is on a different category...gpu - fitness accessory....I'm not shure it can work...the item on fitness category is also different in size...

I think its ideal they're from same category but I have seen @mothered mention before it's not the be all end all. Just ticks more boxes if it is. And as for the box aslong as the wrong item fits in the box you personally received its fine. No good if it doesn't because that's the whole point, wrong item was shipped to you in that box