It is a set of three heatsinks for the Raspberry Pi that are appropriate for use with applications. The third one serves as a backup. Just remove the backing and adhere it to the top of the IC, and you're done.
M.2 Heatsink Cooler 2280 SSD Aluminum Alloy Cooling Heat Sink Set, Silver
New 20PCS Heat Sink 21x15x10mm Aluminum Heat Sink TO-220 Transistors DIY
10pcs Transistor Heat Sink Aluminum Heat Sink for TO-220 Transistor Device
10A-40A Aluminum Heat Sink for Solid State Relay SSR Small Type Heat Dissipation
3W LED Aluminum Heat Sink Round Electronic Radiator OD=36mm H=50mm
