AC&SC serials is a kind of solar collector, It used ... and the pipe. 1, Stainless steel /Aluminum Manifold2, 0.5/0.6/0.7MM heat pipe with anti-freezing function3 ... Aluminum Alloy or SUS304 stainless steel.2, copper 0.5/0.6/0.7MM heat pipe with anti-freezing function ... bearing: 8bar/116psi.4, ISO9001 / CE certificate/EN-12975.5, 5 years warranty.6, Corrosion resistant brazed copper header.7, Attractive ...