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두피괄사는 없는데 진짜 시원하겠네요~
The white one above is a ceramic gua sha. It is an excellent product for the trapezius muscles, armpits, and face.
The one at the bottom is a scalp gua sha. Personally, I don't recommend the wooden ones, but as for the ceramic ones, you can use them for a long time as long as you are careful not to break them!