5C21D67553, 5C21D67554, 5C21D67555, 5C21D67556. This part is a genuine part direct from Lenovo so you can be sure you are receiving the highest quality product available. Genuine Lenovo. 21BU, 21BW, 21CG, 21AL, 21BS, 21AK, 21EX, 21EY, 21J3, 21J4, 21CR, 21CM, 21CN, 21H1, 21H2, 21H3, 21H4, 21H5, 21H6, 21H7, 21H8, 21B4, 21B6, 21C1, 21C2, 21C4, 21BC.
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