Replacement RB1-8787-000CN - For HP 4000, 4050, 4100 Paper Sensing Tray 1

Replacement RB1-8700-000CN - For HP 4000/4050 Laser Shutter Release Arm

Replacement for HP LaserJet 4000/4100 Paper Tray Sensing Arm RB1-8879-000CN Sell

Replacement RB1-8886-000CN - For HP LaserJet 4000/4050 Cover Feeder Pca

Replacement RB1-8879-000CN - For HP LaserJet 4000/4100 Paper Tray Sensing Arm

HP Laser Jet 4000/4050/4100, Tray 1 Ssparartio Pad, RG5-5281-020

Replacement for HP LaserJet 4000/4050 Laser Shutter Release Arm RB1-8700-000CN S

HP RB1-9009-000cn Paper Level Indicator for 250/500 Sheet Tray HP 4000/4050/4500