OEM HP A8P79-60120 ADF Assembly for HP LaserJet M521 series | DN Printer Solutions, LLC
Maintenance Kit 220V (Japan) for HP CF116-67903 Laserjet Enterprise 500 Mfp M525 Flow Mfp M525c PRO Mfp M521 (Includes Fuser Transfer Roller Tray 1 Separation - China HP 500 Mfp, HP CF116-67903
HP LaserJet Pro MFP M521 | HP LaserJet | HP - YouTube
Control-panel layout - HP LaserJet Pro MFP M521 series