RFID wet inlay (HF / UHF) is made of aluminum antenna , pet substrate and rfid chip . It can have 13.56Mhz , 860-960Mhz frequency chip can be options .  Comparing dry inlay ,  rfid wet inlay has adhesive backside and can stick on items and normally final size will bigger 3-5mm than dry inlay . Customized antenna size and finished size are available .