With a genuine OKI Black Toner Cartridge (44973508) installed in your OKI laser printer, you can enjoy amazing print output and reliable operation. Make sure to order a replacement cartridge when you see Toner Low on the display. Then swap it for the empty cartridge when you see Toner Empty and resume printing as quickly as possible. This standard yield toner cartridge is packed with enough black toner to print 7,000 pages and is designed for C511, C531 and MC562 printers.