I have taken note of BB-packaging also the books cartons (professional). Both boxes have the same corrugated strength. They are as stable as you would expect of really good packing boxes! The books are a bit smaller boxes (not much), so that just fit well Aktenordner exactly. When they are fully packed with books, they should not be greater also because they otherwise can no longer wear (and I'm no pushover!).
I would recommend this board quality without restriction! The boxes of my recent relocation were significantly worse / lousy (ebay).
