The Burroughs Unisys AP 1317 Dot Matrix 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 Unisys AP1317 printer cartridges also contain 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 Burroughs-Unisys dot matrix printer has up to a 2 year shelf life for definitive performance and convenience.