... heating transfer solar water heater*CE,ISO9000,ISo14001*high efficient vacuum tube*rapid heating transfer High efficient vacuum tube solar collector: size: ... 25mmbracket: aluminum alloy, thickness: 3.0mm feature: 1.that collector can install anywhere, space is unlimited. on roof, or ... a full system completely autumatic, you can uae hot water anytime, high efficient,and no-pollution.3. installation: ...