DARK BLUE GLASS TUBE Supplying dark blue glass tube, UV glass tube DARK BLUE GLASS TUBE, Glass Tube, Glass Tubing, ... Fluorescent Tube, Flare Tube, Exhaust Tube, Lamp Tube FeatureAlso called Black Blue ... Its a kind of very deep violet-blue glass tubing quite transparent to medium and longer ... on your requirements.OEM acceptable Dark Blue Glass Tube