... 460, 470, 480, 500.d) Insulation layer: high density polyurethane foaming, thickness: 50-60mme) Bracket: stainless ... Keymark,SABS... ________________________________________________________________________________ Name: Non-Pressure Solar Water Heater With Auxiliary Tank(Colored Steel Series) a) Item ... 460, 470, 480, 500.d) Insulation layer: high density polyurethane foaming, thickness: 50-60mm.e) ...