I ordered 6 items, and I noticed that one item was incorrect because there are two different wheels for the same model number - one for push machine and for self-push. I called and emailed to stop the item before it was shipped, but they said it can't be stopped, and it was shipped the next day. After delivery, I called & emailed twice to return or exchange for the correct part, and I was told that it has to be approved. it is over two weeks and I have no reply.
All the other products ordered are installed and working perfect - just need to exchange the wheels for the correct one. I will change my rating when the return is resolved.