An anodized (black) aluminum heat sink radiates heat better than a similar silver non-anodized heat sink. The emissivity of anodized aluminum is 0.85 while unfinished is only 0.05. Cooling can be increased by approximately 10 to 45%, depending on the application.
Purchase a heat sink at the same time as one of our control panel kits or enclosures and we will tap the heat sink for you and include mounting bolts at no extra cost. Our heat sinks are made in the USA.