Acroprint 39-0121-000 Replacement Ribbon for Acroprint Model 175, Model 310, ES700 and ES900, Black Time Clock Genuine Acroprint replacement ribbon cartridge for Acroprint ES700, ES900, Model 175 and ATT310 time recorders Black ribbon for printing Easy loading for simple and quick replacement Frame made of metal for maximum durability and quality Genuine Acroprint ribbon as included with new Acroprint clocks Choose Genuine Acroprint brand ribbons and accessories for best performance and to extend the life of your Acroprint clocks