Fangrui Product Details Numbering Design: The Seal Is Laser Printed, And The Default Serial Number Is Displayed In Black Letters To Facilitate Recording Information During Use; The Total Length Of The Stamp Seal Is 9.8 Inches / 250 Mm Tamper-proof: One-time Use Numbered Zipper Tamp Seals, Each Piece Has A Series Of Identification Numbers; Once Locked, The Zippered Plastic Tag Cannot Be Opened; 1000 Pieces Of Self-locking Stamp Seals Are Enough To Meet Your Needs High Quality Materials: The Plastic Safety Tamping Seal Is Made Of Plastic, Which Is Anti-aging, - And Has Good Elasticity; The Digital Zipper Seal Is For Tool Kits And Is Secure Enough But Not Too Difficult To Break. Easy To Use: When An Occurs, Pull Up The Tie And It Can Be Easily Torn Off By Hand; Automatic Locking And Hand Breaking, Easy To Use And Adjustable In Length; Plastic Safety Tamper Tags Meet Your Needs And Time Wide Range Of Applications: Numbered Disposable Tamped Seals Are Suitable For Fire Extinguishers, Kits, Zipper Bags, Cables, Clot