Black toner 23K for Aficio MP C4000/C5000.Compatible Printers: Infotec MP C 5000 F, Ricoh Aficio MP C 4000 Series, Infotec MP C 4000 F, Lanier LD 540 Series, Infotec MP C 5000, Savin C 5050, NRG MP C 4000, NRG MP C 5000, Gestetner MP C 5000, Rex Rotary MP C 5000, Lanier LD 540 C, Ricoh Aficio MP C 4000 AD, Ricoh Aficio MP C 4000, Savin C 4040, Ricoh Aficio MP C 5000, Rex Rotary MP C 4000, Ricoh Aficio MP C 4000 spf, Lanier LD 550 C SPF, Ricoh Aficio MP C 5000 AD, Savin C 4040 SPF, Gestetner MP C 4000, Lanier LD 550 C, Lanier LD 540 C SPF, Ricoh Aficio MP C 5000 spf, Savin C 5050 SPF, Infotec MP C 4000 Series, Savin C 4000 Series, Lanier LD 550 Series, Ricoh Aficio MP C 5000 Series, Savin C 5000 Series, Infotec MP C 4000, Infotec MP C 5000 Series