... % in houseSamples availableManufacture since 1987Heat Pipe Collector,evacuated tube collectorSL-FTRG Series Feature:1. Reliable and efficient ... Aluminum alloy &thickness:2.0mm2). Heat pipe Collectors: 58 x 1, 800mm (Absorption: 93%~95%; Emittance: 3%~5 ... collector, heat pipe solar collector, evacuated tube collector, evacuated tube solar collector, vacuum tube solar collector, solar heat pipe collector ...