1.Certificate: SRCC, Solar keymark ,EN12975,ISO,SGS,CE,CCC 2. ... alloyGlass tube dimensions:58mmX1.8mDaily efficiency:>55%Hail resistance:25mmMax pressure:12BarCoating of vacuum tube:ALN/AIN-SS/CUHeat pipe:anti ... *2701*1940*350*2702*1940*350*180certificateEN12975-1,2 SOLAR KEYMARKEN12975-1,2 SOLAR KEYMARKEN12975-1,2 SOLAR KEYMARKMaterial vacuum tubehigh borosilicate glasssize58 ...