A:AnswerNot sure but I can say that it was included.
You might go to the GE Appliance Site and watch a video on how to unpack and install. Sorry I cannot be more specific.
A:AnswerAlmost all of your microwaves except for certain microwaves that are special ordered have a standard of 30 in wide. That being said there's about a 98% chance that the new microwave will be the same width as your current microwave therefore you should be able to use the current spacers as well. The only thing that may change is the mounting bracket that is currently melted on the wall behind here microwave.
A:AnswerNo, this oven does not come with a shelf. I don't believe that there can be a retro bought shelf as there are no hangers for a shelf inside of the oven.