This product is not a complete shed, but is an extender kit. Meaning, if you already own or plan on owning these sheds below, then this will extend it even deeper by 6'. For example, if you are purchasing a 12x20 model this kit will make that a 12x26 shed.
It works with these existing sheds below:
50961 Duramax Imperial Metal Garage 12x20 - Garage Shed
55161 55131 Duramax Imperial Storage Buildings 12x26 Metal Garage
55261 Duramax Imperial Metal Garage Shed - 12x32 Storage Building