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⭐SAFE. It is tested after production to make sure it is safe.The innermost layer is aluminum, covered by high performance carbon fiber wrapped in epoxy resin matrix,enfolded by protective glass fiber wrapped in epoxy resin matrix, make it more strength while being lighter. ⭐NEW MANUFACTURE DATE. It is produced in recently 3 months, and we already did the hydro test after production. ⭐Light weight: Up to 30 percent lighter than comparable steel cylinders; ⭐High pressure resistance; ⭐Leakage first before explosion;