Catalog > Electro-Mechanical Components > Heatsinks > Finger Shaped Black Anodized Aluminum HeatSink HeatSink HeatSink Aluminum 55.26W Extrusion Part No: SK39-75SA 218.50 ZAR inc for 1 Each (Quoting) Add to Cart Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE Specifications Width : 4.776" (121.30mm) Fin Height : 1.236" (31.40mm) Series : SK 39 Power Dissipation @ Temperature Rise : 55.26W @ 105°C Thermal Resistance @ Forced Air Flow : 0.59°C/W Thermal Resistance @ Natural : 1.9°C/W Type : Board Level, Extrusion Material : Aluminum Shape : Rectangular Material Finish : Black Anodized