1)Capacity: 120L, 240L, 260L, 320L 2) Flat panel: 2sqm, 4sqm 3) Absorb coating: black paint, black chrome, selective blue coating 4) Absorb plate: all copper ,copper and aluminum unified core5) Support: galvanized steel sheet with paint 6) Inner water tank: food grade SUS304 stainless steel 7) Out tank: imported color steel plate 8) Measure of flat: 2,000 x 1,000 x 70mm9) Quality: first class