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 unique 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 tamper seal is made of plastic, which is anti-aging, corrosion-resistant and has good elasticity; the digital zipper seal is perfect for tool kits and is secure enough but not too difficult to break. Easy to use: When an emergency 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 will meet your needs and save time. Wide range of applications: Numbered disposable tampered seals are suitable for fire extinguishers, kits, zipper bags, cables, cloth bags, hospitals, duty-free shops, supermarkets, ID tags, sprinkler systems, and trailers. Color: black. Material: plastic. Package contents: 1 set x security tags. 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 to appear slightly different from the real thing. The measurement allowed error is +/- 1-3cm.