We are offering buy spectrum analysis tubes mass produced we offer competitive rates and high quality for spectroscopically pure gases filled spectrum analysis tubes, 20 or 30 cm length, central capillary of 5 cm to give bright spectrum emission, with side metal electrodes, for easy connections filled with rare and other gases like krypton, helium, neon, argon, hydrogen, oxygen, carbon dioxide, etc etc contact for your current and all future enquiries demands .