This product is either discontinued or we cannot get that from suppliers.
OKI 44318510 Toner Cartridge, Magenta, Yield 20,000 pages at 5% coverage, Laser Print, Compatible with Oki C711cdtn C711dn C711dtn C711n.
OKI 44318510 Magenta Ep Cartridge Drum For C711n Yield 20000 Pages.