Could be a little heavier, but for the price they'll do.  Bought them for bookshelves in my home office. Needed  more shelves for each of the 2 units I needed ( I have a lot of books), so bought 3 units so I could make the shelves closer together on the 2. Cheaper than trying to buy just extra shelves.   Also use just the extra bottom section with 2 shelves as a cart for moving boxes.