Toner cartridges are designed for use with the OKI ML100 , 320 Series , turbo 320 , 321

Toner cartridges are designed for use with the OKI ML380, 390, 391

Toner cartridges are designed for use with the OKI ML590 , 591.

Toner cartridges are designed for use with the OKI ML420, 421, 490, 491