Partsmart New BLT-4100-DPX Belt, Duplexer Roller Compatible with HP LaserJet 4100

Printel ROL-4000-DG Roller, Duplexer Guide Compatible for Laser Printer 4000

Partsmart New RK-4000 Preventive Maintenance Roller Kit Compatible with HP LaserJet 4000 4050

Printel DR-4000-L Duplexer Roller, Long Compatible for Laser Printer 4000, 4100

Printel DR-4100 Duplexer Roller w/Pin & Bushing Compatible for Laser Printer 4100

Printel DR-4000-S Duplexer Roller, Short Compatible for Laser Printer 4000

RB1-9044-000 Duplexer Cover, Top Compatible for HP Laserjet 4000