The Ohmite E series if offered in multiple extrusion lengths and is black anodized to provide great thermal performance in natural convection applications. This extrusion form can be used for TO-220 devices and provides a thermal resistance as low as 6.2 °C/W. For use with Ohmite part series TBH25 and TCH35. These heatsinks can also be used for other power devices requiring thermal assistance.