... , Harmonious with Building Hot Water Thermal Collector Panels, Split Design, Harmonious with BuildingKey Specifications/Special Features:Aluminum alloy ... inside tubes, so it still work when some tubes broken Split design, harmonious with building Easy to combine with existing ... , buildings, hotels, hospitals and swimming pools Tube size: 58 x 1,800mmNumber of tube: 30 pieces Approved by EN12975-1, 2 ...