Features: Experience high speed data transfer with 13.56MHz copyable , featuring rewritable memory for smooth integration in logistics and small access control device . Engineered with 100,000+ rewrites cycles and industrial adhesive, these strong labels maintain strong adhesion on metal, plastic, and uneven surfaces. Ideal for warehouse staff, facility managers, and IT professionals requiring reliable asset trackings and real time inventory updates. optimizes operations in manufacturing plant, small libraries, or automates parking systems where rapid scanning is critical. suitable for most readers, these strong streamlines inventory management and enhances security across industrial and residential environment. Specifications: Material: metal Diamter: about 25mm/1in Frequency: 13.56MHz Agreement: ISO14443A Capacity: 1k bytes memory Number of rewrites: 100,000 times Modulation: Ask Coding Reading distance: 0 to 10 cm (depending on the reader) Package Includes: 5xUID Copyable Or 10xUID Copyable Or 20xUID Copyable note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the differences between different monitors, the picture may not reflect the actual colorful of the item.