1 all glass tube, coated SS/Al-N-Al/Cu layer 2 47*1500mm, normal capacity 6L/T 3 eco-friendly 4 certification ISO9001-2000 STRUCTURE The all-glass vacuum tube is made up with the inside glass tube sun selective absorption coating vacuum sandwich cover glass tube, provide support (spring), getter. MAIN PROCESS incision coated exhausting packing specification StructureAll-Glass Double Tube Co-Axial ...