Item Type: Heat Sink. Heat Sink Overall Size: Approx. 100 x 50 x 50mm / 3.94 x 1.97 x 1.97in. Heat Sink Interval Width: Approx. 16mm / 0.63in. 1 x Heat Sink. Great Material: Surface anodized aluminium material has good thermal conductivity, and very durable with wearing.