This Auction for total of 20 copper shims pads 20x20 mm they come in different thickness as following:
6 of Copper shim 20x20x0.3 mm
6 of Copper shim 20x20x0.5 mm
8 of Copper shim 20x20x1 mm
Specification:
Picture is been captured from exact similar item you will receive !
The copper piece is high-purity copper.
Thermal conductivity up to 401w/mk. (The ordinary copper thermal conductivity only 20-30w/mk ）