In combination with Panasonic's waterproof outlet, it is only suitable for series with width 80 mm. Besides 80 mm, there are 78 mm wide ones. It looks exactly the same, so be careful with the combination. (There is an exclusive compatible part number on 78 mm.) In the bottom 27 mm hole, not only the just CD tube but also the PF tube could be fixed without gap. It is a well thought-out product that makes it easy to hang buried.