Zebra ZD420 Ribbon Cartridge Printer: If you need fast 4-inch thermal printers that are easy to use, easy to deploy and easy to manage, then choose the ZD420. Building on the legacy of the industry-leading GK Series printers, the ZD420 Series printers deliver features and functionality that take deployment and management simplicity to a new level. The ZD420's faster, higher-quality printing keeps your business moving, along with application flexibility and a low total cost of ownership (TCO). In addition to the innovative ribbon cartridge, on-site upgrades and just about every modern wired and wireless connectivity option, the ZD420 also comes with Link-OS. This unique software platform greatly reduces time spent integrating, managing and troubleshooting all of your printers — making your thermal printers more cost-effective than ever.