The Lower Pressure Roller for HP Laserjet PRO M402, M403, M426mfp, M427mfp (LPR-M402) is an essential component for maintaining the high-quality performance of your HP LaserJet printer. This roller is responsible for applying the correct pressure to the fuser assembly, ensuring that toner is properly bonded to the paper. It plays a critical role in producing clean, crisp prints with consistent results, while also helping to prevent paper jams and other operational issues.