As you can see, this is a heat sink. It's been sitting in its bag, deep inside my parts bin... It's a new, unused item, only taken out of the bag for these photos. 10 pieces per bag. Described in photo 1. Width: Approximately 42mm Depth: Approximately 17mm Height: Approximately 10mm Thickness: Approximately 1.1mm Weight: Approximately 2.4g (per piece) U-shaped section width: Approximately 18mm #Heatsink #Transistor #ElectronicComponents