Ultra Iron Man is the Ultra version of Iron Man's Mark II armor. It is very powerful. Anthony Stark rarely uses this armor since it's too rare of an armor to risk getting copied.
Anthony had made an exact replica of his Mark II armor and he then modified that armor to turn it into the very first Ultra Armor. The Ultra Armor was the rarest armor Stark had ever made.
The Ultra Armor is an armor that is 8 ft. tall and 6 feet wide. It's a Gold and Black armor with built-in missiles on the shoulders. It also has jetpack and jetboots.