1. Further processing clear quartz tube 2. U bend, spiral, C shape, and any shapes if you can show ... . Good price. Sealing Quartz TubeOur company also do quartz glass tubes deep-processing. There is cutting, burning mouth, sealing, bending, ... kind of sealing, one is sealing the end of the tubes round, and the other is flat.No matter what ... and good service from us. Further Processing of quartz tubes