... purity Resistance high temperature The charactor of clear quartz tube: 1) High purity materials, high temperature annealing does ... a manufacturer for alll kinds of quartz products. Including quartz tube,quartz rod, quartz plate, quartz crucible, quartz boat, and ... productShow(); oProductShow.init( { 'aImgSrc': aBigImageSrc } ); } )(); good quality quartz glass tube with different thickness from China