The inner tube is coated with a special selective coating (Al-N/Al) which excellent solar radiation absorption and minimal reflection properties. Detailed Product Description: Length 1500mm 1800mm Outer tube diameter 47mm 58mm Inner tube diameter 37mm 47mm Weight 1.3kg 2.2kg Glass thickness 1.6mm 1.6mm Material Borosilicate Glass 3.3 Borosilicate Glass 3.3 Absorptive coating Graded A1/N/A1 Graded A1/N/A1 Vacuum degree P<5*10 -3 Pa P<5*10 -3 Pa Our manufacturing operations are geared to volume production and high quality assurance. The plants are well equipped with modern machinery and specialized tooling for efficient and reliable production. We also passed the ISO9001:2000 and the CE identification. |