heat pipe aluminum alloy solar thermal collector certificate:ISO,CE,SGS, SRCC, Solar Keymark solar collector with heat pipespecificationRe Ba series is solar collcetor with aluminum-alloy outer shell (100 ... .2mm5.Vacuum tube : Transition heat-pipe tube(1500mm,47mm and 1800mm,58mm,inside 0.5mm copper tube)6. Hail resistance: 25mm Detailed Product Description 1) solar collector is ...