we do custom RFID  ceramic ship ,it is not damage as common ceramic chips in the market,it is not broken  as  standard ceramic chips,we have two size for you choose, 40mm and 43mm, also ceramic chips with metal inner it,the detail as:
  40mm ceramic chip with RFID  8G /PC     
  40MM CERAMIC chips with Metal inner  14g/pc
  43mm Ceramic chip with RFID 9.5g/pc
  43mm Ceramic chips with Metal inner is  15.5g/pc
please tell me if have interest