The Datatrol 8620 Dot Matrix Cash Register / Printer offers a dynamic ink delivery system, producing printouts with a series tiny metal rods or pins striking against a ribbon gliding across the paper. Each Compatible Epson Nylon Ribbon Cartridge has a space saving design which easily installs, to reduce downtime normally spent on complicated replacement procedures. These Compatible Epson ERC-03B Single Black Cash Register Ribbon Cartridges have the power and durability to tackle the most demanding print tasks. The Datatrol 8620 Printer also contains a thermal ribbon, which minimizes smudging and blurring when handled. We guarantee excellent print quality with our Compatible Epson Ribbon Cartridges or we will refund your money within 90 days of purchase. And every Epson ribbon cartridge for your Datatrol dot matrix printer has up to a 2 year shelf life for definitive performance and convenience.