The Zebra GK420t is a thermal transfer printer that requires specific ribbons for optimal performance. Here’s a detailed overview of the ribbons compatible with this printer: Zebra GK420t Ribbon Overview 1. Ribbon Type Thermal Transfer Ribbons: The GK420t uses thermal transfer technology, which requires a ribbon to transfer ink onto labels. 2. Ribbon Sizes Common ribbon widths ... https://theprintcartridgeshop.com.au/product/4-x-rolls-zebra-ribbon-for-gk420t-gx420t-gx430t-thermal-transfer-ribbon-wax-roll/