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help channel https://yasobe.ru/na/all_that_iss stamp of the certifying organization (certification can be in different places), frequency of re-certification once every 5 years. month, year of the passed certification and the year until which the certification is valid. stamp of the manufacturer. serial number of the cylinder. month of manufacture, year of manufacture, certification of the manufacturer. working pressure of the cylinder. test pressure of the cylinder. volume of the cylinder. stamp of the quality control department of the manufacturer. weight of the cylinder. Until December 19, 2014, the cylinder passport exists in the form of numbers applied to the neck of the cylinder. When purchasing cylinders from the manufacturer, only a quality passport for a batch of cylinders is provided as an accompaniment, indicating in the register the numbers and type of gas for a specific cylinder.