Instruction: Evaluate the answerability of a question by analyzing the related document, outputting yes if the document contains information addressing the question, and no otherwise.

Input:
Question: chrome or zinc
Document: would buy them again. very sturdy shelves. packaged nicely. arrived on time. industrial strength. great quality. used them in my glass studio to help organize the gear.
i change what i keep on my shelves and this is flexible to let me keep changing the shelf heights, but sturdy enough to take whatever i put on it (books, boxes, etc)
heavy duty easy to put together...happy with this purchase I would  buy this again.I shop on Amazon for everything and think they are great!
great shelves, easy to assemble...definitely use a rubber mallet to help assembly process. sturdy, can hold a lot of product
You need a person at each end of the shelf to hold all the pieces together simultaneously.If the circular brackets at the corners of the shelves are out of round, they won't form a good fit on the plastic pieces that clamp onto the vertical bars. Check the packaging when you receive the shelves. An impact on the corners of the box could deform the brackets.I expect I'll buy more of these.
Wow, this is not only highly functional, but it is aesthetically pleasing! I purchased this to increase my pantry size. I was able to put this together with the help of my teenage daughter (it was SO easy). There are no tools necessary to assemble. Simply put the black rings on the support poles where you want the shelf to land, slide the shelf down the poles and click it into place. We had the whole unit put together in less than ten minutes.
Worse still, the plastic collars that snap together to hold the shelves are flimsy and do not always hold, necessitating an awkward removal of the shelf and a repeat effort to position it.To sum up: These shelves take longer to put together than similar designs from other makers, and the result is less satsfactory.
We have had these shelves for almost two years. Due to limited space in our current kitchen, we use them to store pots, pans, small appliances and other cooking utensils. They have worked great.
We bought these to store our decorations on its very much a big help it works great and holds everything we have
Very happy with this shelf!
Answer: no