The pressure roller bushing for an HP LJ p1102 is a small, robust, and durable component, often made of nylon or a Teflon-coated material, designed to provide a stable, low-friction base for the lower pressure roller in the fuser assembly. Its primary function is to ensure smooth rotation of the pressure roller, which compresses the paper against the heated fuser roller to fuse the toner, thereby maintaining consistent and high-quality printing.