OKI Microline 420 Personal Printer - Dot-Matrix - 9 pin - Monochrome

Built for reliability and precision, the OKI Microline 420 is a 9-pin dot-matrix impact printer designed for high-speed, high-volume printing of multi-part forms, invoices, and continuous feed reports. Engineered to handle demanding business environments, the ML420 delivers sharp monochrome text, durable performance, and compatibility with a wide range of systems and legacy applications. Its long-life ribbon, straight-through paper path, and rugged construction make it an ideal solution for offices, warehouses, and point-of-sale operations.

Product Features: 

• 9-Pin Impact Printing – Creates clear, crisp output on single and multi-part forms
• Fast Print Speeds – Up to 570 characters per second (High-Speed Draft mode)
• Straight Paper Path – Handles continuous, multipart, and single-sheet media with ease
• Long-Lasting Printhead – Rated for 200 million characters for extended use
• Flexible Connectivity – Parallel and serial ports for easy integration into existing setups
• Compact and Reliable – Built for durability in demanding business environments
• Ideal for Forms & Reports – Perfect for checks, labels, invoices, and shipping logs

Note: This is a refurbished item that comes with a 90-day exchange warranty. This has been serviced and calibrated to work as new. Servicing can include replacement of print heads, gears, rollers, cleaning and re-lubricating all internal mechanisms. Porter Electronics prides itself on only acquiring top quality used products that show minimal signs of use. Buying from Porter Electronics you should expect a very nice, refurbished unit. We do offer an extended warranty that can be purchased during checkout and will apply at the end of our already 90-day warranty.

Porter Electronics also offers free tech support for those needing extra help. We offer a free digital download of the manual for this on this page in the “Downloads” tab. If you are unable to locate the link, just use our Contact Us page to request one.