ITEM NAME:4pcs/Set Aluminum Copper Heatsinks Cooling Cooler Radiator for Raspberry Pi 4B Product Description Description: 4pcs/Set Aluminum Copper Heatsinks Cooler Radiator Cooling Block Kit for Raspberry Pi 4B Features: These pure aluminum heat sinks include adhesive thermal tape for efficient thermal transfer to the heat sink providing additional cooling to the IC. The shape of these radiators is fully compliant with the Raspberry Pi 4B standard. Specification: Applicable: for Raspberry Pi 4B Material: Pure Copper, Pure Aluminum Color: Black, Blue, Copper Red, Gold, etc. Size: - Black: 9 X 9 X 5mm/0.35 X 0.35 X 0.2" - Blue: 14 X 9 X 5mm/0.55 X 0.35 X 0.2" - Copper Red: 13 X 12 X 5mm/0.51 X 0.47 X 0.2" - Gold: 7 X 7 X 6mm/0.28 X 0.28 X 0.24" Notes: 1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! 2. Please allow 1-3mm measuring deviation due to manual measurement. Included: 4 X Heatsinks.The shape of these radiators is fully compliant with the Raspberry Pi 4B standard. Applicable: for Raspberry Pi 4B. Included: 4 X Heatsinks. Material: Pure Copper, Pure Aluminum. Color: Black, Blue, Copper Red, Gold, etc.