Amazon.com: TCM USA Ricoh SP 3600DN Alternative Black High Yield Toner Cartridge. Made in USA. Replacement for use in Ricoh SP 3600, SP 3610, SP 4510 Series Printers. Yields up to 6,000
1PK 407324 Drum Unit Remanufactured Black Ricoh SP 3600DN-SF 3610SF 4510DN-SF | eBay
ABCToner - Original Ricoh Toner Kit black 3000 pages (407323, TYPE-SP4500LE) Aficio SP 3600 DN SF 3610 4510