... production include:quartz tube,quartz rod,quartz casing,quartzwater jacket,quartz plate, quartz ring,quartz beaker,quartz copple,quartzinstrument,various quartz bend,bulboid type quartz tube , special-shaped quartz tube, low ozone quartz ultraviolet ... flat head)and othersshape or flared end,shrink mouth,flanging,sand-ground,high temperature resistance,corrosion resistance,good transparence, damp- ...