RB1-8873-000CNGuide - Paper Guide Support - this is the bigger piece showing on the diagram. (guide only part number is RB1-8890-000CN).
RB1-8890-000CNGuide - Paper guide - Includes paper guide for 500 sheet feeder. (For bigger item please order RB1-8873-000CN).
RB1-8924-000CNGuide - Optional lower cassette support guide
RG5-2643-020CNGuide - HP Paper Feed Guide Assembly designed for LaserJet 4000 and 4050 series printers. It is a common replacement part used to fix broken retaining tabs that hold the transfer roller in place often referred to as the small media or transfer roller assembly
RG5-2643-160CNGuide - HP Paper Feed Guide Assembly designed for LaserJet 4000 and 4050 series printers. It is a common replacement part used to fix broken retaining tabs that hold the transfer roller in place often referred to as the small media or transfer roller assembly