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???? For a long time I studied the topic of which cylinder is safer, composite or metal, and still decided to buy composite ones. And already at the warehouse of the transport company, I realized that I was not mistaken in my choice. The cylinders are VERY light. So I am starting a series of tests in real conditions. ???? Cylinder manufacturer - http://www.hexagoncomposites.ru ???? Please subscribe to the channel - / @diysam 6+