This product was not sold in bulk selling, it was sold for 4 meters per meter. How many pieces were used for ventilation work, it is two. So, I put it in two closets. Moreover, I think that it will set aside for some construction. The impression of watching with this pipe took time to cut. After that, I wonder if it is okay.
There was no one with straight end faces. There was always a step difference. Some were waving. It is an unusual usage method of setting soil on the equipment and collecting soil, but still able to be used, but it can not be used any more. We strongly hope for improvement. If you do not ask next, stop it.