I have not seen anywhere in the order ad that mounting screws are included. So I ordered a 4 bolt kit for almost $30. When I received the cover I found 4 screws hidden in the foam. These screws are also designed for a 4 inch roof. If you are lucky enough to have a 6 inch thick roof (the more insulation the better) you will need to order longer screws. The A/C wasn't as heavy as I feared, so I placed the box on the rails in my truck bed and stood next to the trailer. I climbed into bed and lifted her onto the roof. It was also easy to get up and down from the roof with a ladder in the bed. Do your homework on You Tube.
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