Abstract: A reclosable zipper for a reclosable bag comprises a first closure having a first base, a first pair of locking members integrally connected to the first base, and a center guide post integrally connected to the first base. The center guide post is positioned adjacent to and between the first pair of locking members. The zipper further comprises a second closure having a second base, a second pair of locking members integrally connected to the second base, and a pair of outer guide posts integrally connected to the second base. The second pair of locking members are positioned adjacent to and between the pair of outer guide posts. The second closure is disposed adjacent and opposite to the first closure, and the second closure is constructed and arranged to interlock with the first closure over a predetermined length by engagement of the second pair of locking members with the first pair of locking members.