... all copperQuality: first classSupport: galvanized steel sheet with paintInner water tank: Enamel wareOut tank: imported color steel plate.Product Specification ... plate style structure, high heat effect, high hot water produced, anti-insolate, water heated in the copper pipe, reliable quality, free maintenance ... 70mm/80mm/90mm,2m× 1m flat solar collector, the water can rise to 55°C in the sunnday 75- ...