This Waffletechnology® Cleaning Card is specifically designed to maintain Canon CR-50, CR-80, CR-135i and 190i check transport models. When used regularly, this card will keep your check transports performing as designed. This superior cleaning card is embraced by Canon as the only product to use on all the Canon check transport models. Use this product routinely to keep your scanners clean. Use this product to clean Canon CR-50, CR-80, CR-135i and 190i check transports.