For use in Kyocera TASKalfa 4550ci, 4551ci, 5550ci, 5551ci and Copystar CS4550i, CS4551ci, CS5550ci, CS5551ci color laser printers Compatible Replacement Toner Cartridges for Kyocera TK-8507K, TK-8507C, TK-8507M, TK-8507Y and Copystar TK-8509K, TK-8509C, TK-8509M, TK-8509Y Toner kit contains: 1 of each CMYK cartridge. Yield 30,000 pages black, 20,000 pages color; based on the industry standard ISO/IEC 19798 at 5% coverage The Smarter Choice, Made to Match OEM performance.