X409F, F409F, A409F, R427F, X409U, F409U, A409U, R427U. X509U, F509U, A509U, R521U, X509F, F509F, A509F, R521F. Suitable for VivoBook S6 X409 F409 X509 F509 R521 Y4200 Y5200 6th generation 6th generation FL8700.
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