Solar boiler with heat exchanger 1. Inner tank: 1.5-2.0mm food grade stainless steel 304, 316 Outer tank: 0.6mm stainless steel 304 Or coated galvanized steel 2. Insulation: 50mm 3. Heat exchanger: Copper coil or stainless coil 12#/1mm Or 16#/1.2mm Or other 4. Capacity: 50-1000L Terms: 1. Validity: till 31,Jan,2011. 2. Payment terms: 30% in advance and 70% against copy of B/L or L/C, For sample T/T 100% in advance 3. Delivery terms: 15 working days after receiving deposit or original L/C. 4. Warranty: 7 years,If any leakage of tank, after confirmation, we will replace it for free.5. Minimum quantity: 5 sets 6. Package: Sunpower standard export package with Sunpower Logo or the package you want on the basis of OEM. About Us:Jiangsu Sunpower Solar Technology Co., Ltd1. Leading exporter: more than 500000 sets of solar water heater productsper year to 82 countries.2. OEM professional: systematic OEM service, from package design totech support......3. Various certificates: ISO, EN12975, EU CE, Solar Keymark, Kang-Ju, KOLAS, SABS, SRCC4. Strong warranty: In order to keep long and good business relationships, our company have strict quality control and aftersale service.