TO-220 Heat SinkWhen ICs heat up, it can lead to a big problem. Help dissipate the heat with a heat sink or heat sink compounds. Features: Made of black, anodized aluminum Fits TO-220 packages Number of holes: 1 Size: 0.75"L x 0.52"W x 0.25"H (19.05mm L x 13.20mm W x 6.35mm H)