Replacement imaging unit for OKI printers. Replaces worn parts with fresh components. Renew your print quality for crisp, quality results. For use with the B401, MB441/451. Page Yield: 25,000.Compatible Printers: OKI MB 450 Series, OKI B 401 D, OKI B 401 DN, OKI MB 451, OKI MB 451 w, OKI MB 451 dnw, OKI MB 451 dn, OKI MB 441