We are able to supply Fire-fighting cylinders for carbon dioxide,the main type is 5-120L.material:30CrMo,37Mn Sichuan Mingchuan Chengyu Co.,Ltd. is a large comprehensive enterprise that specializes in gas cylinder production and involves industry and trade industries.We supply SCMCC Fire-fighting cylinders.Main type: 5-120LWorking Pressure: 8-20MPAMaterial: 30CrMo,37Mn