1. 320 Labels/Roll, One Roll Of Thermal Labels 40x20mm 2. High Quality, Thermal Label Lamination, , Waterproof, Oil-Proof, Tear-Proof, Leaving No Traces, , And Biodegradable. 3. Label Tape, B21/B3s Label Replacement Self-Adhesive Labels Are Very Suitable For Business, Office, School, Home, Etc. 4. Stronger Adhesion, Using Direct Thermal Printing Technology, Clear Printing Without Ink Or Toner. 5. Compatibility, The Printer Label Is Suitable For B21/B3s Portable Label Machine. Please Choose The Appropriate Label Paper And Label Machine Model To Obtain The Best Printing Results. Technology: Thermal Technology Function: Waterproof And Wear- Note: Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Not Affect The Use Colour:As Shown Material:PVC type:B Package Contents: 1 Roll x Thermal Printing Paper Label Paper Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.