... degree 4,Low OH 5, Nice Appearances Quartz Tube with large diameter high purity1,quartz tube: 2 purity 99.99% min3,Resistance ... 3-300mm clear quartz tube(high purity,good heating resistance,low OH), UV-stop quartz tube, red quartz tube, processed quartz tube, quartz rod, quartz plate, gray quartz tube, and so ... accepted, we can make as your requirement. waitting for your special specification to offer.