Part Number : Q3961A, Q396167901, Q396167902. Compatible with models:Color Laserjet 2550L, Color Laserjet 2550Ln, Color Laserjet 2550n, Color Laserjet 2820 All-in-One, Color Laserjet 2830 All-in-One, Color Laserjet 2840 All-in-One.
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