all copper core and copper flow pipe standard fixing high transmittance for heating 10years assurance Quotation of the all copper core solar flat panel Model SJW-P1SJW-P2SJW-P3Heating core Size of core1900*10601900*10601900*1060Material of header pipeφ25*0.60, copper TP2φ25*0.60,copperTP2φ25*0.60,copperTP2Material of riser tubeφ10*0.50, copper TP2φ10*0.50,copperTP2φ10*0.50,copperTP2Absorb heater ...