The boxes are perfect for the move (not only of books). Extremely stable, aubzubauen handy and easy. Proceed really carefully build please and especially Around the handle reinforcement. It is about 1 cm wide and the carton is then above also entspchend wide. Thus, the relatively thin cardboard is so stable that it can withstand really 40 KG. Am thrilled and have reordered. Never boxes back from the supermarket!
