.JP Brother Genuine LC406BKS INKvestment Tank Standard Yield Blk Ink Cartridge. This Brother Genuine LC406BKS standard yield black ink cartridge works in seamless unison with your Brother INKvestment Tank inkjet printer to provide sharp prints that you can rely on for up to 3,000 pages per cartridge. Intelligently engineered as part of a complete printing system, it delivers crisp output with consistently superior print quality.