Solar energy collector 1)EN12975, Solar Keymark 2)Efficiency than flat plat 3)Pressure system 4)10day delivery time, OEM 1. Jinyi solar energy collector technical date:1) Model no.: JHC-58/18-20 2) Quantity of tubes: 10,12, 15, 18, 20, 24, 25, 30, 36.3) Seperately packing?: Yes (tube and manifold seperately)4) Technology: Metal heat pipe with twin glass vacuum tube5) Total length of tube : ...