Specifications: 4 X 6 inch direct thermal fanfold labels, 1 stack with 500 labels. Matte yellow thermal label paper with permanent adhesive and perforations between each label for clean separation. Prints without ink, toner, or ribbons. High-Volume Shipping Workflows: Designed for stack-fed shipping stations and fulfillment areas. Ideal for 4X6 shipping labels, order routing, outbound packages, and packing workflows where fast reloads and uninterrupted printing matter. Scan-Ready Prints: Direct thermal printer labels produce clear barcodes and readable text for consistent scanning. Fanfold stacks feed smoothly through rear-feed paths to reduce skewing, misfeeds, and wasted labels during batch printing. Reliable Adhesion: Permanent adhesive thermal label stickers adhere securely to corrugated boxes, poly mailers, bubble mailers, and flat packaging surfaces. Built to stay attached through handling, sorting, and transit. Compatibility: Thermal label printer paper works with MUNBYN, Zebra, Elton, Fargo, Intermec, Rollo, iDRPT, Polono, Jiose, K Comer, LabelRange, OFFNOVA, JADENS, Phomemo, and NefLaca. Not compatible with DYMO or Brother. These 4x6 inch fanfold thermal labels are built for high-volume shipping environments that rely on stack-fed printing rather than roll holders. The fanfold format feeds from a folded stack, allowing faster reloads, a smaller desk footprint, and consistent alignment during long print runs. Designed for shipping and fulfillment workflows, this format supports batch printing for outbound orders, routing documents, and package identification where uninterrupted printing matters. Fanfold stacks sit flat behind or beneath compatible printers, reducing tension issues commonly associated with rolls and helping maintain steady feed paths during peak packing periods. The direct thermal construction produces clear barcodes and readable text without ink, toner, or ribbons, making these thermal shipping labels suitable for daily operational use. Perforations between each label enable clean separation and predictable stopping points, supporting accurate printing and efficient application at shipping stations. A permanent adhesive keeps labels securely attached to corrugated boxes, poly mailers, bubble mailers, and other common packaging materials throughout handling and transit. The yellow face color improves visual recognition for routing, sorting, or internal differentiation without altering print performance. These printable shipping labels are intended for indoor shipping operations and printer-applied use. For teams running continuous fulfillment, pack-and-ship lines, or space-constrained desks, the fanfold format offers a reliable alternative to roll-based labels when speed, alignment, and reload efficiency are priorities.