The Toshiba T-FC50U-K Toner in black is a genuine/original toner cartridge designed specifically for Toshiba E-Studio 2555C, 3055C, 3555C, and 4555C printers. This laser print technology ensures high-quality, professional-looking documents with every print. Compatible with various Toshiba E-Studio models, this toner cartridge is a reliable and efficient solution for producing crisp and clear black prints for all your printing needs.