Lenovo HEAT SINKS
5H40W65018
is compatible in the following Models:
Lenovo ThinkPad X Series laptops
X13s (Type 21BX, 21BY) Laptop (ThinkPad) - 21BX0011AU
X13s (Type 21BX, 21BY) Laptop (ThinkPad) - 21BXCTO1WW
X13s (Type 21BX, 21BY) Laptop (ThinkPad) - 21BYS00000