Use these bright white topcoated direct thermal labels with your ZQ630 mobile printer. The 4" Wide x 6" High size is perfect for shipping or inventory labeling. These labels will also work with the QLn420 mobile printer. 3/4" core and 2 3/8" overall diameter. Timing mark on the back of the liner and perforations between labels. PLEASE NOTE: All names and brands listed are the property of their respective owners. RJS Enterprises, Inc. does not claim any sponsorship, affiliation, connection or association with any of the other companies, products, names or trademarks listed. Made in the USA