... cooling of UPS,Inverter,PCB,AC drivers and Transducer etc.Surface treatment: anodized (black),powder coated,polished,mill finished,sand ... factors to consider: High heatsink surface. It's at the surface of the heatsink where the thermal transfer takes place. Therefore, ... you to use a thinner layer of thermal compound, which will reduce the thermal resistance between heatsink and heat source. Good ...