The Everprint CHIP-OKI-B411-B is a black cartridge chip for compatible OKI laser printers. It supports cartridge identification and reuse after refilling, as the chip stores status information such as page count and toner use.
The listed compatible models are OKI B411, B431, MB461, MB471 and MB491. Its stated print yield is 3,000 pages. This replacement chip is intended to help a refilled cartridge be used again in the listed printers.