This packaging unit (20) includes a first tray (21) for positioning elongated objects and a support structure (26) for supporting this first tray (21), including a first reception area (29) for receiving said first tray (21), this first tray (21) including openings (24a) for the reception of the elongated objects (2).According to the invention, the packaging unit (20) includes a second tray (22) with openings (24b) for the reception of elongated objects (2) and said support structure (26) includes a second reception area (29), intended to receive this second tray (22), this second reception area (29) being arranged so as to position this second tray (22) on said support structure (26), opposite the first tray (21) and so that the openings (24b) of said second tray (22) are offset with respect to the openings (24a) of said first tray (21), this offset being such that each opening (24a) of the first tray (21) is located apart from the perimeter of each opening (24b) of the second tray (22), this second tray (22) being positioned with respect to the first tray (21) such that elongated objects (2) engaged in the openings (24a) of the first tray (21) can imbricate with elongated objects (2) engaged in the openings (24b) of the second tray (22), and vice versa.
