Amazon.com: MADE IN USA TONER Compatible Replacement for use in Konica Minolta bizhub C258, c308, c368, c454, c554, C454e, C554e Universal (TN-324K/C/M/Y, TN-512C/M/Y/K) (Black,Cyan,Yellow,Magenta, 4-Pack) : Office Products
Konica Minolta A33K132 TN512K Toner Cartridge Black bizhub C454 C554 C454e C554e - Sun Data Supply
Konica-Minolta Bizhub (Genuine) TN-512 Toner CMYK Value Pack (Set of 4) – CopierMax
1PCS for Konica Minolta Bizhub C454 C554 TN512 Copier Toner Cartridge Japan High Quality New compatible - AliExpress