... Copper pipe: material purple copper,Glass tube: high borosilicate 3.3, thickness: 2.0mm, Three target type.Insulation: rock wool or import ... autumatic, you can uae hot water anytime, high efficient,and no-pollution.3. Installation: instal full system is very ... plastic spraying; thickness: 2.0mmHeat Pipe Evacuated TubeVacuum TubeThree high vacuum tube, ALN/ALN-SS/CU absorber coating, Dia: 58mm, Length: ...