The RL2074DT is a Direct Thermal roll with a 1" core and 4" outer diameter which appears to be compatible with the Bixolon DX220 printer specifications. Because there are no minimum order quantities on our standard items, you can order just one roll to see how well it works with your printer. You can also request free samples of our Direct Thermal material at the link below if you would like to test this product before placing an order. https://www.onlinelabels.com/samples