The 1989 Donruss Grand Slammers set contains 12 standard-size cards. Each card in the set can be found with five different colored border combinations, but no color combination of borders appears to be scarcer than any other. The set includes cards for each player who hit one or more grand slams in 1988. The backs detail the players' grand slams. The cards were distributed one per cello pack as well as an insert (complete) set in each factory set.
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