If you want to make sure that your prints are clear and precise, you need to make sure that all of your individual components are working to their maximum capacity. A fuser unit is essential for the smooth and efficient transfer of toner on to the paper. If your fuser unit isn't working as well as it could be, you'll find that your results will be blurred and of a generally lower standard. This fuser unit is designed for the AcuLaser C3000 and C4100 and will deliver up to 30,000 pages.