1,quartz glass rod 2 tight tolearance 3,Resistance 1100 ... · GOOD AFTER-SALE SERVICEWe can also make tubes according to your requirement!Physical Properties (g/cc)Density20 ... °C kg.m-32.2Degree of Hardness Moh’s ... resistance,low OH), UV-stop quartz tube, red quartz tube, processed quartz tube, quartz rod, quartz plate, gray quartz tube, and so on. ...