Features: brand new and high quality Multi-proof thermal label sticker printing sticker with strong stickiness, clear print. Smooth and bright, long storage for time. Sufficient quantity of environmentally friendly materials A roll of stickers is 500 sheets in total, with a core of 40mm.If the printer is not compatible, you can’for t put it in. Applicable machine:barcode printer with thermal printer function. Specifications: Material: Heat Sensitive Adhesive Process: CNC Die Cutting Core: about 40mm/1.57in Size:about 100x100/3.94x3.94in / 100x150mm/3.94x5.9 inch (optional) Applicable Machine:Barcode Printer with Thermal Printer Function Package Includes: 1x Roll Thermal Printer Paper (Other acessaries are not included) note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment.