evacuated tube is Borosilicate glass,Graded AL-N/AL Solar Selective Absorbing Coating.

evacuated tube ,

Borosilicate Glass,Size: 58x1800mm blue-black or red

1, Glass Material: Borosilicate Glass

2, Size: 58x1800mm blue-black or red with heat pipe

3, Construction: Graded AL-N/AL Solar Selective Absorbing Coating

4, Absorbance : More than 93%

5, Emittance: Less than 6%

6, Vacuum :  less than 5x10-3 PA

7, Stagnation Parameter: -280m2C/KW

evacuated tube