How to configure the Zebra GK420D printer for printing Royal Mail's 2D barcode labels
What Labels Fit A Zebra GK420d Label Printer?
Label Metrics 100 x 150mm White Direct Thermal Labels - Zebra GK420D, GX420D, GK420T - 5 Rolls 1,250 Labels : Amazon.co.uk: Stationery & Office Supplies
4 x 6" Direct Thermal Labels For Zebra GK420D / ZD420 / LP2844 With Pe
1 Roll (500 Labels) Direct Thermal Labels White (6" by 4") 100mm x 150mm for Zebra Printer GK420D GX420D GK420T : Amazon.co.uk: Stationery & Office Supplies