Original Brother TN230BK Toner Cartridge. Page Yield: 1400 pages approx. Yellow. Toner particle size, shape and colour pigmentation all have a direct impact on the sharpness of the printed image. Brother's toner is formulated to exacting standards to ensure you receive high quality print resolution and reliability. Why not do your bit for the environment and return your used toner and drum units to our award winning recycling factory in Wales.