Shellmaterial:AdoptingaluminumalloyInnermaterial:Adoptingcopperpipepressure-typeproductionBracketmaterial:Adoptingdomesticgoodnessgalvanizedsheet,sprayingplastics,highlycorrosion-resistant.Vacuummaterial:AdoptinghighborosilicateglassandUltra-catheterconfiguration,Specificati***:100L,200L,300L,400L,500L.)