The product is a set of all 13 walk-off home run ticket stubs from Jim Thome, who holds the all time record for wlak off homeruns. You get all 13 dates:
6/15/94 CLE
6/07/95 CLE
4/10/98 CLE
4/16/00 CLE
8/04/00 CLE
4/21/01 CLE
6/13/01 CLE
7/07/01 CLE
7/28/02 CLE
9/16/07 CWS (also his 500th HR)
9/06/08 CWS
8/17/10 MIN
6/23/12 PHL
You see his 500th HR is included as it was a walk off.