... tank Solar Water HeatersSOLAR KEY MARK and SRCC CertificateWe provide Solar Water Heater, Water Heater, solar collector,Hot Water Heater, solar hot water,Solar Water ... x 2,100mm, 70mm x 2,000mm. The inner water tank is made of 304 2B stainless steel which is food ... Fastening pieces was made of stainless steel screw. pressurized tank Solar Water Heaters (SOLAR KEY MARK and SRCC Certificate)