1.CE,Solar Keymark(EN12975) appoved 2.Long service life:25years 3.MOQ: 3 pieces 4.Best quality, fast delivery ,low price Black chrome flat plate solar collector Product information:1) Low-iron Tempered Glass,4mm thick2) Core absorber panle :black chrome 3) Glass fiber warm keeper,can be widely used in real estate, hotels, hospitals, factories, offices, swimming pool, student apartments and others ...