... , 15, 18, 21, 24, 30, 36 piecesAssistant tank capacity: 80 to 120LSolar Water Heating SystemSpecifications:. Inner Tank: SUS304-2B food grade ... , 160L, 177L, 213L, 266L, 319L. Package: Export carton Features:. Simple to install. Renewable Energy. Environmental Protection. Suitable for both flat roof and ...