Gestetner 2521 Z
Ricoh 887523 cartridges are used in these printers:
Ricoh FT 4215, Ricoh FT 4220, Ricoh FT 4221, Ricoh FT 4222, Ricoh FT 4414, Ricoh FT 4415, Ricoh FT 4418, Ricoh FT 4421, Ricoh FT 4435, Ricoh FT 5518, Ricoh NT 2040, Ricoh NT 4020, Ricoh NT 4030, Ricoh Spiro 1500, Gestetner 2515 Z, Gestetner 2518 Z, Gestetner 2520 Z, Gestetner 2520 ZD, Gestetner 2521 Z, Gestetner 2522 S, Gestetner 2522 ZD, Gestetner 2615, Gestetner 2620, Gestetner 2622, Infotec 9115 Z, Infotec 9118 Z, Infotec 9122 Z, Infotec 9192, Infotec 9215, Infotec 9315, Infotec 9320, Infotec 9322, MB 5115, MB 5320, MB 5322, MB 5415, Memocopy 218 N, Memocopy 315, Memocopy 320, Memocopy 322, Nashuatec 3018, Nashuatec 3115, Nashuatec 3120, Nashuatec 3121, Nashuatec 3222, Nashuatec 3415, Rex 8515 Z, Rex 8518 Z, Rex 8522, Rex 8615, UNIT C 320, UNIT C 322, UNIT C 415,