... . EN12975, EN12976, SRCC, CE 2. 30tubes: 2033.1W 3. high density rock wool 4. solar system SOLAR KEYMARK,SRCC,ISO ... 6Mpa,Test pressure:1.2MpaVacuum tube(Transition heat-pipe tube)Type ParameterDiameter=58mmDiameter=47mmMaterialHigh Borosilicate glassHigh ... Collector Mounting: Flat Roof/Inclined Roof from 18 degree to 45 degree 2.adjust bracket width ,easy to assemble Solar collector/Heat pipe collector ...