... pipes, and bracket.The material of manifold case is aluminum alloy. The shape is pentagon, so that it ... of three (triple) targets vacuum tube, copper pipe, aluminum absorber fin, and silicon stopper. For assembled heat pipe, ... The bracket is also made of 1.5mm thickness aluminum alloy, and it is very strong. The ... through Copper Heat Pipe Solar Collector With Aluminum Alloy Frame Solar Keymark Approved