... of sealing, one is sealing the end of the tubes round, and the other is flat.No matter what kind of sealing ... -300mm clear quartz tube, UV-stop quartz tube, red quartz tube, processed quartz tube, quartz rod, quartz plate, gray quartz tube, and so on. And we have ... further capacity of trim cutting, fire-polishing, pinching, and bending, and so on. They ...