Your review: When the manufacturer coated the metal it was applied too thick or the black rings used to secure the shelves were designed for smaller posts. It was difficult to assemble. I have a lot of experience with this type of shelving as I have 22 units in my home. This was very difficult to install.
Pros: The manufacturer prints measurements on the post.
Cons: The coating or black rings used to secure the shelves were not manufactured corrently. It was difficult!