RFID On-metal tag can be mount on metal surface. And strong enough to use outdoor. It is design for harsh outdoor On metal Tag is design for harsh outdoor application. It is fill with epoxy material, completely water-proof, 3M glue. It works perfectly on metal surface. Applications for the On-metal tag: Process Control & Factory Automation Item Identification Security Patrol checkpoint Key Features: Dimensions: 50*50mm Housing: Epoxy Crystal tag Water-proof: Yes, IP68 Operating Temperature: -20 to +70 Resistance: Harsh outdoor, metal surface Optional RFID ICs: 13.56MHz: Mifare 1K/4K/Ultralight (NXP) ISO14443A; I CODE SLI ISO15693; Tag-it HF2048; 125KHz: EM Marin EM4102/4100; 125KHz Unique GK4001; Hitag1/2; Atmel T5567; Reading Range: Depanding on RFID technology and reader design Optional function: N/A Customization Support: Silk-Screen Printing LOGO Laser Engrave LOGO Jet Printing Serial Number Laser Engrave Serial Number