Support steady color printing with the Lexmark 78C0X40 yellow toner cartridge. Built for Lexmark CS/CX421 and CX522 devices, this OEM cartridge helps maintain consistent yellow output for business documents, internal reports, and customer-facing materials. For procurement teams and IT administrators, OEM toner reduces the risk that comes with mixed supply sources. It helps preserve print quality across the fleet, simplifies standardization, and keeps replacement cycles easier to forecast. That matters when print uptime, color consistency, and supportability all affect day-to-day operations. With an estimated 5,000-page yield, this cartridge is a practical fit for organizations that want dependable output without unnecessary oversizing. It delivers the right balance of capacity and control for departments that print regularly and need output that stays sharp from first page to last. If your Lexmark environment depends on predictable color performance, this cartridge is built to keep it moving.