Flat solar panel 1.long service time 2. nice looking 3.low cost 4.iso,solar keymark Flat Solar Collector,solar thermal collector,flat solar panel * OEM&ODM * 5 years warranty* CE,SRCC,SGS,Solar Keymark,ISO9001:2008Flat solar collector features•Flat collector size:2000*1000*82mm•Header pipe material:Copper•Riser pipe material:Copper•Absorb fins material:Copper •Surface coating material:Blue ...