You are purchasing 4 tubes of genuine Riso brand S-8113 black ink. For use in Risograph EZ220, EZ390, EZ391, EZ590, EZ591, MZ390, MZ790, RZ220, RZ230, RZ310, RZ390, RZ590, and RZ790 digital duplicators.

This product has been recently manufactured, this is not old inventory.  Old Riso part # was S-4254.

We pack the product boxes in another box to protect them during shipping. Thanks for looking at our listing.