【Specification】Fan-fold 4” X 6” (100x150mm) direct thermal shipping labels. 500 labels per stack, 1 stack per box, total 500 labels. 【Print Clear】Use premium-grade label materials that print crystal clear and extra-dark images, texts and barcodes. Design a perforated line between labels for easily peeling off. 【Strong Adhesive】Strong adhesive label sticks to all surfaces such as product package, corrugated boxes, envelopes and more. BPA and BPS free. 【Compatibility】Compatible with popular thermal label printers such as LabelRange, Zebra, Datamax, Rollo, MUNBYN and other direct thermal label printers. Not for Dymo 4XL printer. 【Label Applications】Widely used in shipping labels, address labels, warehouse labels, product labels and more. Fan-fold 4''x6'' (100x150mm) Direct Thermal Shipping Labels 500 labels per stack, 1 stack per box, total 500 labels.