There are 10 different posters or 5 different Sets. Each Set has a letter ( Located on bottom line of poster)
These charts are great for outdoor use, made of vinyl. Perfect for pregame warmups. There are several ways to use these charts:

As saccadic charts -   Saccades are rapid, ballistic movements of the eyes that abruptly change the point of fixation. They range in amplitude from the small movements made while reading, for example, to the much larger movements made while gazing around a room. Saccades can be elicited voluntarily, but occur reflexively whenever the eyes are open, even when fixated on a target.
As decision making charts - as we all know, decision making is an integral part of every sport. The quicker your eyes can recognize what is about to happen, the better your decision will be and the better your performance will be.
As speed of recognition charts -  expert athletes extract more task-relevant information from each fixation than do less skilled athletes, and that player's proficiency influences the strategy used in the treatment of visual information. Speed of recognition can be improved.

This price is for ONE Chart. In addition to the chart you will receive some ways to make it more challenging.