4" Wide x 6" High labels with 3/4" core - 2 3/8" overall diameter - 105 per roll - 2,520 total labels Compatible with Zebra QL420, QLn420, and ZQ630 Mobile Printers Topcoated Direct Thermal Labels (NO Ribbons needed) with permanent adhesive Perforation Between labels - Wound Out With Timing Mark Made in the USA Use these 4" Wide x 6" High labels with your Zebra QL420, QLn420, and ZQ630 Mobile Printers. These rolls have 3/4" core and 2 3/8" overall diameter. White topcoated direct thermal labels with perforation between labels and timing mark on back. 105 labels per roll, 2,520 total labels. Made in the USA!