Black Toner 7,000 pages For: MB461, 471, 491Compatible Printers: OKI B 431 DN plus, OKI MB 491, OKI MB 461, OKI B 431 DN, OKI MB 471, OKI B 431 D, OKI MB 471 w, OKI MB 491 Plus, OKI MB 491 Plus LP