You are purchasing a box of 2 black inks, compatible with Riso S-539 ink. These inks are also compatible with Riso part # S-3878 and S-569. For use in the Risograph GR 1700, 1750, 2700, 2710, 2750, 3710, 3750, RA 4200, 4900, 5900, RC 4000, 4500, 5600, 5800, and 6300.

This product has been recently manufactured. Our customers have had great results with this compatible brand.

Please feel free to email me any questions about compatibility, etc. We pack the product boxes in another box to protect them during shipping. Thanks for looking at our listing.