... & pressurized 3.10 years warranty Solar water heater frame Material of Model:1.the heater pipe is made of red copper TU1 ... 150L,200L,250L,300L,400L,500L,600L,700L,800L............solar water collector1) Reliable, efficient, twin-glass evacuated tubes2) Red copper(TU1) ... Loading Quantity(set)20102787763574022116916613613040HQ278213209172171Price(USD) Split aluminum solar water heater frame parts