H S MARSTON 890SP-01000-A-100 Heat Sink, Ultra-Fin™, 0.12 °C/W, 101.6 mm, 32 mm, 100 mm
Made in China Cheap Price Heat Sink Custom Aluminum Alloy Die Casting Heat Sink High Quality - China Machining Parts HS Code, CNC Parts | Made-in-China.com
Solved Example 2: Selecting a Heat Sink for a Transistor | Chegg.com