For use in Kyocera TASKalfa 3050ci, 3051ci, 3550ci, 3551ci and Copystar CS3050ci, CS3051ci, CS3550ci, CS3551ci color laser printers Compatible Replacement Toner Cartridges for Kyocera TK-8307K, TK-8307C, TK-8307M, TK-8307Y and Copystar TK-8309K, TK-8309C, TK-8309M, TK-8309Y Toner kit contains: 1 of each CMYK cartridge. Yield 25,000 pages black, 15,000 pages color; based on the industry standard ISO/IEC 19798 at 5% coverage The Smarter Choice, Made to Match OEM performance.