Outside Diameter: 108mm (5L), 159mm(10L), 219mm, 229mm Material: 37Mn, 30CrMo, 34CrMo4 Water capacity: 33L??40L 50L Working pressure: 150bar Testing pressure: 250bar Manufacture standard: GB5099,ISO 9809, DOT-3AA,KGS,IS7285 Length: 1320mm (without valve and cap) Quality: 43.40KGS (without valve and cap) Thickness: Min 5.7mm Approval: CE Packing: Each piece covered with a plastic net bag