Kyocera TK-5280 Compatible Toner Cartridge Set delivers professional-quality prints for your Ecosys M6635cidn multifunction printer. This aftermarket toner set includes all four colors (black, cyan, magenta, yellow) and offers an impressive 13,000 page yield at 5% page coverage, making it an economical choice for high-volume printing environments. Compatible Models: Kyocera Ecosys M6635cidn. Features: Zero-fill cartridges can be refilled for extended use, sealed packaging with security label, 2-year manufacturer warranty. Storage Specifications: Temperature -20°C to -40°C, Humidity 10-90% RH. Operating Temperature: 10°C to 32.5°C. Usage Tips: Avoid touching drum surfaces, store in cool and dry location, use only with compatible printers, shake gently before use, keep away from children. Premium quality compatible toner at fraction of OEM cost.