An apparatus for use in a shrink packaging machine for accommodating a greater height variance of articles includes: rollers, each roller including a shaft and a cylinder on the shaft for rotation about an axis of the shaft; and a frame including a pair of parallel side members generally extending in a first, horizontal direction and defining slots receiving opposite ends of the shafts for mounting of the rollers there between. Each of the slots has a slot length that extends in horizontal and vertical directions, and the rollers each generally extends in a third direction orthogonal both to the horizontal and vertical directions. Furthermore, each of the rollers is received within a pair of the slots and is vertically and horizontally displaceable and, when each roller is disposed at its respective lowermost position, the axes of the rollers do not all lie within a horizontal plane.