... 2) easy operation and fashion Haining BAOGUANG unpressurized split solar water heater collector with high quality and excellent efficiency ... ).Seal: silicone rubber polymer9).Fastness: stainless steel screws10)Solar absorptance 93%;heat emittance 7%11)Tank capacity:135, ... about 72,82,98,110,136,156Kg DescripitNon-pressurized solar water heaterinner tank materialSUS304-2B Food Class Stainless Steelouter ...