Each spot purchased in this break will receive 1 LEFT Side Serial # (1,2,3,4,5,6,7,8,9,0). If a card is is pulled that has a LEFT side serial ENDING with your number you get the card. If the card is not serial #'d it goes based on the set number on the back of the card. For instance if the set number is card #90 it will go to whoever has the number 0. This is a 10 spot break.