PREMIUM QULAITY OF AUSTIC GENUINE DRUM TONER CARTRIDGES YIELDING 23,000 PAGES. COMPATIBLE PRINTERS (IF ANY): OKI B411,OKI B431,OKI MB491,OKI MB471,OKI B432,OKI B512,OKI MB472,OKI MB492,OKI MB562,OKI B412