Zebra - 4 x 4 in Direct Thermal Paper Labels, Z-Perform 2000D Permanent Adhesive Shipping Labels, Zebra Desktop Printer Compatible, 1 in Core - 6 Rolls FULL LENGTH ROLLS: 4 x 4 in | 1 in core | 5 in Roll Diameter | 640 labels per roll | 6 rolls | 3,840 total labels DIRECT THERMAL: Tested and certified by Zebra engineers to provide optimal performance and reduce printer downtime EXCELLENT PRINT QUALITY: High print definition, low temperature resistant, and BPA and latex free RECOMMENDED USE: Great for shipping labels, address labeling, box labeling, warehouse, product identification, and distribution DESKTOP PRINTER COMPATIBLE: Compatible with Zebra desktop printers and many other brands including Honeywell, Datamax, Intermec, Sato, & TSC