ITEM NAME:10pcs Black 20x15x10mm Aluminum Heat Sink Cooling Fin for TO-220 Triode IC These heat sinks cool a device by dissipating heat into the surrounds and are great for TO-220 Triode IC etc. Description: - Size (L x W x H): Approx. 20 x 15 x 10mm/ 0.79 x 0.59 x 0.39inch - Bottom board thickness: Approx. 2mm - Teeth thickness: Approx. 1.2mm - Teeth spacing: Approx. 12mm/ 4.7inch - Color: Black - Material: Pure aluminum, spray paint technology Package Included: 10 x IC cooling fins.These heat sinks cool a device by dissipating heat into the surrounds and are great forTO-220 Triode IC etc. 10 x IC cooling fins. - Material: Pure aluminum, spray paint technology. - Bottom board thickness: Approx.