I bought with a beginner to Internetrechereche this tube, also because it was recommended to me by friends as "the standard". This design is impeccable and fully recommended for people who want one for the hall or surrounding area. (There are easier, but oh well, who are few grams so no matter if you do not have to carry up the whole mountain.)
Meanwhile, I personally, however, a significant improvement in safety in some semi-automatic, and have this tube therefore no longer in use.
