ARD-Optics manufactures polished tubes from sapphire.
Sapphire tubes are used in lamps of high intensity, UV sterilization, etc.
Cylinders-rods & tubes
ARD-Optics manufactures polished cylinders-rods (stepped rods with very strict internal angle step) and tubes from sapphire and other optical materials.
Cylinders are used in medical installations as lightguides. Sapphire tubes are used in the lamps of high intensity, UV sterilization and etc.