This is a toner cartridge for OKI's MICROLINE 9600PS, Pro9800PS-E/Pro9800PS-S/Pro9800-X printers. It's yellow, but I also have black ones listed. I had these in storage. I'm selling them because I've switched to a new printer model. I hope someone can use them. They are unused, but have been stored for a while, so I'm offering them at a discounted price.