RFID Blank Card is chip embedded into PVC material .It can be 125khz low frequency , 13.56mhz high frequency and 860-960mhz ultra high frequency . normally cards is 85.5*54mm and same as credit card .Zhixin RFID Tag Co.,Ltd uses new material to produce all smart card and gift cards you can check and compare with recycle material obviously .each blank rfid card has laminated both-side and can reprint yourselves.