Since it is a door of a sliding door, I looked for as thin as possible and small ones. If it was 6 mm in thickness as described in the product, it was just like a safe finish (confirmed through a 6 mm plate) but as it arrived the thickness of the double-sided seal increased, and it did not fit into the gap of the sliding door and could not be used. I think that the goods themselves are good goods though it is big for the room at home. I am firm and I think that it is user-friendly if it is an ordinary door of a company, because the appearance is also refreshing. I am happy that there is a small and slim thin type about half size for the room door of the private home.