I bought this copy stand to replace an older plastic one that was broken. I'm sending this one back and applying duct tape to my old one to keep it going. As others have said, the clear plastic guide bar is completely useless. Yes, the stand holds 150 sheets, but you can only place one sheet of paper behind the bar! The bar does slide up & down, but you must push it so hard you think it's going to break. Not sure why the manufacture even bothered to put it on this stand.Do not waste your money on this product.