... degree 4,Low OH 5, Nice Appearances Quartz Tube with large diameter high purity1,quartz tube: 2 purity 99.99% min3,Resistance ... work4,Low OH5, Nice Appearances, no bubble, no airlineSpecification:Outer Diameter: 3-480mmWall Thickness: 1-10mmPhysical PropertiesDensity 20oC g/cm3 2 ...