1.Manufacture standard; EN ISO 9809-1/-3 2.Material:34CrMo4/37Mn 3. Test pressure: 250bar/315bar 4.Working pressure:167bar/210bar 5.Filling gas: N2,Ar,CO2,O2,etc 6.Trade mark: OEM 7.Delivery time:30 days 8.Production capacity:60000pcs/month