75 x 41 1/8 slide out floor with a 73 3/8 vertical  
Rought opening requirements are 79 1/2 wide and 73 5/8 tall
comes with floor measureing 75 x 41 1/8  that is a welded steel frame that is decked insulated and wired with AC/DC and  the drive pre installed , the wall frame that fits into you rough opening , along with the seals, trim and corners for the coach  
 
the shack walls and the ceiling are not provided