The Casio SP 300 Slip Printer offers a dynamic ink delivery system, ideal for offices and restaurants that send out mail, flyers, invitations, or newsletters on a frequent basis. Each Compatible Epson Ribbon Cartridge has a space saving design which easily installs, to reduce downtime normally spent on complicated replacement procedures. We carry the Compatible Epson ERC-03B Single Black Cash Register Ribbon Cartridges which have been tested to ensure outstanding printing results for your Casio SP-300 Labeler machine. We guarantee excellent labeling capabilities with our Compatible Epson ribbons or we will refund your money within 90 days of purchase. And all of our Compatible Epson cartridges for your Casio printer will last up to 2 years for definitive convenience and performance.