The Casio ECR 400 SP is a point of sale, cash register system designed to help accelerate your business' financial transactions. Combining your Casio ECR-400SP Cash Register with our Compatible Epson ribbon cartridges will create bold and smooth text on printouts and receipts. We carry the Compatible Epson ERC-03B Single Black Cash Register Ribbon cartridges which have been designed to easily fit into your Casio ecr400sp printer / cash register. We guarantee excellent print quality with our Compatible Epson Ribbon Cartridges or we will refund your money within 90 days of purchase. And all of our Epson Ribbons for your Casio cash register have up to a 2 year shelf-life for definitive performance and convenience.