Specifications of Evacuated Glass Tubes: Material of Glass Borosilicate Glass Length 1800 mm and 2100 mm Outer diameter 58 mm Inner diameter 47 mm Thickness of Glass Tube Outer tube thickness: 1.8 mm, inner tube thickness: 1.6 mm r 47 mm Thickness of Glass Tube Outer tube thickness: 1.8 mm, inner tube thickness: 1.6 mm Show More