Compatible Riso S539 Black Duplicator Ink For Use In S3878, S-3878, S539, S-539, GR1700, GR1750, GR2700, GR2710, GR2750, GR3710, GR3750, GR-1700, GR-1750, GR-2700, GR-2710, GR-2750, GR-3710, GR-3750, RO-GR-C/A, ROGRCA, U4-GR-C/A, U4GRC, S569, S-569, RA4000, RC4200, RC4500, RC4900, RC5600, RC5800, RC5900, RC6300, RA-4000, RC-4200, RC-4500, RC-4900, RC-5600, RC-5800, RC-5900, RC-6300