1,Certification: ISO ,Solar Keymark ,SRCC,SABS.SGS 2,7 years warranty 3,Delievery 7-10days 4,High Quanlity&Reasonable Price vacuum tube solar water heater Certification:Have passed SRCC,CE,ISO9001:2000,CCC, solar Keymark ,SABS and other certificationFeatures:1) Outer tank material: SUS304 2B stainless steel plate or Colour steel.2) Inner tank material: SUS304 BA food grade stainless steel plate3) ...