ISO 4142:2002 specifies a range of test tubes, suitable for general laboratory use, fabricated from borosilicate, neutral or soda/lime glass, which are designated Type I, Type II and Type III respectively. This title may contain less than 24 pages of technical content.
You can specify the type of files you want, for your device.ISO 4142:2002, Laboratory glassware - Test tubes | ISO/TC 48/SC 2. Which are the reasons I like to read books. Great story by a great author.