Of course they are heatsinks, but why not use much more efficient larger heatsinks for your Pi, like Fin for Raspberry Pi, VGA RAM, IC Chips, Mosfet SCR, Southbridge, Northbridge, with 3M 8810 Heat Transfer Thermal Tape - You better be cooler.
Netac NV7000 NT01NV7000-1T0-E4X SSD, M.2, 1.0Tb, PCI-E x4, Read: 7200 Mb/s, Write: 6800 Mb/s, 3D NAND, 1400TBW, NVMe
11 Review
CPU cooler ALSEYE H120D, black/RGB
16 Review
Cooler ID-Cooling SE-224-XT White (Intel LGA2066/2011/1200/1151/1150/1155/1156// AMD AM4)
26 Review
Heatsink for SSD ESPADA ESP-R1, black
13 Review