... CCC,CE,ISO9001:2008/ISO14001 sample is approved split solar water tankFeatures:1, Inner water tank:SUS304-2B food Grade Stainless steel Thickness:1 ... .2-1.5mm2, Outer water tank: Color plate thickness:0.31-0.4mm3, Capacity:100L-500L4 ... ,CE,CCC,ISO9001:2000 certificates,2,collectors can be designed for you, made in different quantity