There is no exact equivalent to the TaylorMade P790 irons on the Ping golf iron lineup. The Ping i500 irons are the closest in terms of overall size, weight, and feel but lack some of the performance characteristics of the P790s. For example, the P790s have a thinner face than the i500s which leads to more ball speed and distance. They also have slightly less offset than the i500s which helps with accuracy and control. If you're looking for a set of Ping irons that will perform similarly to the P790s, I would recommend checking out the G700 or S55 models.