This is a single tube of Black "GR/RA/RC" ink for Risograph duplicators.
This ink is for the following machines: GR3710, GR3730, GR3750, GR1710/1700, GR1750, GR2700, GR2000, GR2750, RA4000, RA42000, RA4300, RA4900, RC4500, RC5600, RC5600D, RC5800, and RC6300
