BULK FANFOLD EFFICIENCY (500 LABELS): 4″ x 6″ (102 mm x 152 mm) direct thermal fanfold stack with 500 perforated labels feeds flat and continuously – no rolls, holders, curling or jamming. UNIVERSAL PRINTER COMPATIBILITY: Compatible with Rollo, Zebra, MUNBYN, iDPRT, Jadens, Polono, Nelko, Offnova, Arkscan, Godex and most 4×6 direct thermal label printers.