... unique moulds by 2,000ton-3,500 ton extruding machine.Ultra width dimensions heatsink can be extruded with our unique ... cooling of UPS,Inverter,PCB,AC drivers and Transducer etc.Surface treatment: anodized (black),powder coated,polished,mill finished,sand ... have better thermal conductivity; so again, a compromise between high surface (many thin fins) and good thermal transfer (thicker fins) must be ...