Dedicated to producing print solutions to increase efficiency in todays businesses, OKI pride themselves on manufacturing relevant, high performance products specific to business needs. Designed to be precisely compatible with your OKI B4520 or B4540 printer, this cartridge ensures high resolution, high-speed printing. With a standard yield of 6000 pages, this cartridge provides low cost-per-page printing. OKIs free used-consumable recycling programme also helps the environment by reducing landfill waste.