AGPtek&reg; 12 Pipe Aluminum Heat Exchanger Radiator for PC CPU CO2 Laser Water Cool System Computer AGPTEK well male durable Aluminum Heat Exchanger Radiator using integrated forging process Applicable to computer CPU,industrial variable frequency drives, VGA water cooling ,laser head cooling, and air conditioning evaporator. Using the black oxidation paint to increase the thermal efficiency No weak welds nor glue. Size:main size: 6.22inchx4.72inchx1.18inch(158mm x 120mm x 30mm); For Pipe Diameter: 9.5MM (3/8 inch)