PANASONIC UG-3221 TONER (UG-3321 TONER CARTRIDGE) ORIGINAL 6K YIELD For Panasonic Panafax UF-4000 Panafax UF-490 UF4000 UF490 Compatible Printer: Panasonic Fax Machines: Panafax UF-4000, Panafax UF-490 Panasonic UF-490 Fax Machine Panasonic UF4000 Fax Machine PAGE YIELD: 6,000 PAGES OEM PART # UG-3221 UG3221