1)Material: borosilicate glass 3.3
2)OD:47mm/58mm
3)Length:1200mm-2200mm
4)Thickness:1.6mm/1.8mm
Triple concentric solar vacuum tube:
Its most distinguished character is the structure--adding a
glass tube thinner than diameter of inner tube ,two edges being fixed by a stainless steel cross which remains steady enough. With one more tube inside, it has the bilateral
heating effectiveness.
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