Nhowe 80mm Aluminum Heat Exchanger Radiator with 80mm Black Fan for CPU Pc Water Liquid Cool System 100% new, fine workmanship, simple sense is very strong! pure aluminum fins, 1 inch 17 - 20 fin,18 lines per inch.The sealing process: vacuum aluminum brazing,Parts brazing seal as a whole Suitable for liquid cooler system for CPU of computer, Industrical frequency conversion driver, laser head, air conditioning evaporator and industrial control cabinet Free combination in water cooling kit cooling system Thanks and have a good day !