Support higher-volume monochrome printing with genuine Xerox 006R04378 extra high-capacity toner. Built for the Xerox B310, B305, and B315 family, this OEM cartridge is designed to deliver dependable black output with the fit and consistency that enterprise teams expect from original supplies. Extra high-capacity toner is about more than page count. It reduces the operational friction that comes from frequent replacements, especially in shared printer environments where uptime matters. Fewer swaps mean less user disruption, less inventory handling, and a cleaner consumables strategy for IT and procurement. For organizations that print reports, forms, correspondence, and internal documents every day, this cartridge helps keep output predictable. Genuine Xerox supplies are the safer choice when print quality, device compatibility, and supply reliability all need to line up. If your fleet includes the B310, B305, or B315, this extra high-capacity black toner is the practical way to keep pages flowing while protecting the output standard your business depends on.