Keep blue and green output aligned to the standard your workflow depends on. The HP 70 Blue and Green Printhead, part number C9408A, is an OEM maintenance supply designed for compatible HP DesignJet printers that require accurate color channel performance and dependable print quality. When color registration, line definition, and repeatable output matter, a genuine replacement helps preserve the behavior your team expects from the device. For production environments, the value is in control. A matched printhead reduces the risk of inconsistent output that can slow proofing, reprints, and customer-facing deliverables. It is the right choice when you need to maintain the printer’s original output characteristics rather than compensate for a lower-grade substitute. That makes it a practical fit for teams that depend on predictable results across technical drawings, graphics, and color-managed documents. As an OEM component, this printhead is intended to fit the supported platform without forcing process changes. It supports a cleaner maintenance cycle and helps keep the device ready for the next job. If your operation depends on color accuracy and uptime, this replacement is built to protect both.