They came with thermal tape pre applied. Easycargo 10pcs 22mm Heatsink Kit 22x22x10mm + 3M 8810 Thermal Conductive Adhesive Tape, Cooler Heat Sink for Cooling Raspberry Pi, SSD M.2 2280 GPU IC Chips VRAM VGA RAM (22mmx22mmx10mm) https://www.amazon.com/dp/B07D4DY2MZ/ref=cm_sw_r_cp_api_glc_fabc_7OidGbPEMSZTR?_encoding=UTF8&psc=1

For me they didn’t work without a fan on them evacuating the heat. I used about 15 of these heatsinks