Keep your scanner performing smoothly and efficiently with the Brother Genuine PRK-A4001 Replacement Roller Kit. Your Brother scanner is equipped with a scan counter that automatically totals how many times the machine has scanned. After approximately 200,000 scans, you may have to replace the original roller unit. This roller kit makes an ideal replacement option to combat normal wear and tear in the Brother ADS-4900W scanner. The Brother Genuine PRK-A4001 Replacement Roller Kit can be installed easily, helping to ensure business productivity.