Upon receiving our three units we opened only one to identify the item. We were now ready to start this project and discover that these shelves are in pieces inside the boxes. As soon as we opened the other two boxes the damage is obvious. Every shelve appears to be broken. In looking back at the first box, pieces fell out. It seems we opened the end that was not crushed. It looks as if a fork lift ran into these boxes. I would not recommend these the plastic appears to be very brittle.