A card containing 24 numbered spaces and one free space (blank), with which you play BINGO. The numbers are assigned at random on each card and are arranged in five columns of five numbers each by five rows (5 x 5 = 25 in total including the blank square). The numbers in the B column are between 1 and 15, in the I column between 16 and 30, in the N column (containing four numbers and the free space) between 31 and 45, in the G column between 46 and 60, and in the O column between 61 and 75. Players have thousands of unique (unduplicated) cards to choose from. Some manufacturers print unduplicated series of 6,000 cards. There are also series of 9,000 cards available. Hard cards and Flimsy cards have a series number printed on them. For example, card number 1252 will always have the same numbers in the same spaces.