Generic Pack X4 Black Ricoh MP C4503 Toner (841849)
Amazon.com: Do it Wiser Compatible Printer Toner Cartridge Replacement for Ricoh 841852 for use in Ricoh MP C6003 MP C4503 MP C5503 MP C6004 (1Pack - Cyan) : Electronics
Ricoh CYMK Toner Set for MP C4503 C6004SP Part Number: 8418-SET