What is the dimension of the enrance? The Instantvap tube is 6mm and silicone sleeves are available that slide on, these are for use with poly boxes and work well to protect the material. Obviously, it will depend on the entrance height if you use Abelo poly floors but if you make your own floors you are quids in and can devise a means of using it, my floors all have a 7mm hole at the rear and these are plugged wiith allen bolts for the rest of the time.