20 Rolls White 4x6 Direct Thermal 250 Labels Per Roll for Zebra Eltron Barcode Shipping Desktop Printers ZP450 LP2844 LP2442 TLP2844 GC420d GC420t GK420d GK420t GX420d Self-stick adhesive, perforated between each label Core Size: 1" Outer Diameter: 4" **NO RIBBONS REQUIRED** Compatible with Zebra Eltron, Datamax, Intermec, SATO, Fargo, and other thermal printers.