All 2000plus, Ideal, Trodat, KwikStamp, Millennium, etc. (any self-inking stamp or dater that has a removable pad) will use the regular stamp pad refill ink.
Regular stamp pad will use the regular refill ink.
Any of the Xstamper, Classix, Brother, Istamp, AccuStamp, Evermark, UltiMark, etc. (rubber and ink are made as one) MUST USE the refill ink made for that brand. If the brand refill ink is used on a non-brand unit, the chemical reaction will harden stamp to a concrete consistency and will render stamp un-usable.
If brand needed is not shown, please contact us for availability and price.