Patron BUSH-HP-2100-PN is a set of rubber-shaft bearings listed for the HP 2100. The product is identified with the reference RB2-2973, making it a replacement part for work on the printer’s rubber shaft.
HP’s LaserJet 2100 parts guide lists the related reference RB2-2973-000CN as a support bushing in the fusing assembly. This provides a useful context for the part’s role in the printer, while the Patron listing identifies the set itself by its own MPN.
The set is intended for HP 2100 printer servicing where the RB2-2973 rubber-shaft bearing reference applies.