HP OEM HP 4000/4050/4100 Tray 1 Retaining Arm;Compatibility:HP LaserJet 4000,HP LaserJet 4050,HP LaserJet 4100,HP Stylewriter 4100;HP 4000/4050/4100 Tray 1 Retaining Arm;HP, RB2-2387-000CN, RB2-2387-000, HP 4000/4050/4100 Tray 1 Retaining Arm, Accessory;Brand: HP