The Kyocera MC-3100 FS2100 4100 4300 M3550 3560 Primary Charge Roller (PCR) is essential for maintaining high print quality in your Kyocera printers. As someone with 20 years of experience in the printer and copier industry, I can confidently say that this part is crucial in ensuring your documents are sharp, clear, and free from streaks or smudges.