Description Seeedstudio Heat Sink Kit Designed for Raspberry Pi 4B (Not Included) Offers a four-piece aluminum heat sink Material: Black Aluminum The Seeedstudio Heat Sink Kit for Raspberry Pi 4B - Black Aluminum is a four-piece aluminum heat sink kit to cool the chip on the Raspberry Pi 4B. View more What's Included 4x Seeedstudio Heat Sink for Raspberry Pi 4B - Black Aluminum Dimensions Specifications Material: Black Aluminum Heat Sink: 4