... solar water heater tube 1,components of solar water heater and solar collector 2,ISO9001:2008,CE Two target solar water heater tube is made of high ... a tube.The coating of two target solar vacuum tube adopts advanced sputtering technology (SS ... to ensure the stability of the coating , high efficient absorption and low heat radiance losses. ... 6MPaImpact ResistanceΦ≤25mm Two target solar water heater tube