For use with the BradyPrinter i7100 Industrial Label Printer. Green synthetic rubber roller material recommended for high print accuracy on small and large labels. Using a roller of similar width as the media reduces wrinkling and extends print head life. Use with media width up to 50 mm wide -- use narrowest roller that covers the media width, and use narrowest ribbon that covers both media and roller. Rollers are easily changed-out using the on board hex key tool that ships with printer. Clean rollers often with IPA cleaning swabs and replace worn rollers to prevent damage to the print head.