RFID hard tag is laminated with hard pvc or abs material and copper coil antenna or aluminum antenna inside .Most of people hope to use hard rfid tag for key-tag and pets neck tag that is why we use hard stronger material to protect rfid chip work durable and water proof .hard tag can laminate with 125khz . 13.56mhz and 860-960mhz rfid chips according to different applications and reading distance . You can print ,numbering and backside adhesive.