K&U Printware GmbH freecolor TK-510. Page yield: 8000 pages, Printing colours: Black, Compatible products: Kyocera FS-C 520 N, 5020 TN, 5020 DTN, 5025 N, 5025 DN, 5030 N, 5030 TN, 5030 DN, 5030 DTN