An air knife system includes a first set of openings and a second set of openings arranged along opposite first and second walls, respectively, of a main body. The first set of openings may be aligned with the second set of openings such that a coupling member may be inserted through each one of the first set of openings and a corresponding one of the second set of openings. The coupling members may be fixedly joined to the first and second sets of openings to maintain a desired width of a discharge slot defined by a first lip extending from the first wall and a second lip extending from the second wall. In one embodiment, the coupling members may be joined to the first and second sets of openings using a welding process.