We could supply Welding insulation gas cylinder of 175L, 195L,210L and 480L Welding insulation gas cylinder Thermal-insulating mode: high-vacuum multi-layer thermal insulationSpecification: 175L, 210L, 175HL,210HLWorking pressure: ≤1.4MPaMedium: LOX, LIN, LAr,LCO2,Dewar flask applies to scientific research, chemical, electronic industries.