A workpiece handling module including a first housing member and a second housing member pivotally movable relative to the first member forming a housing having an access side and a second side opposite the access side and side walls, a first portion of the side walls is carried by the first member and a second portion of the side walls is carried by the second member, and at least one of the first and second housing members includes at least one sealable opening for allowing ingress and egress of workpieces to and from an interior chamber formed by the first and second housing members in a closed configuration, and the second portion of the side walls adjacent the access side and carried by the second member is greater than the first portion of the side walls adjacent the access side and carried by the first member.