Zebra GK420d GK42-202510-000 Printer, Power Adapter, USB, & Power Cable – Barcodeearth
Amazon.com: Zebra - GK420d Direct Thermal Desktop Printer for Labels, Receipts, Barcodes, Tags, and Wrist Bands - Print Width of 4 in - USB and Ethernet Port Connectivity (Renewed) : Office Products
Zebra GC420t Mac Driver - Print Directly To Your Zebra Printers
How to configure the Zebra GK420D printer for printing Royal Mail's 2D barcode labels