Wave-absorbing RFID Metal Tag on Gas-tank Working frequency:125KHz/13.56MHz ... *35*3.5mm Wave-absorbing RFID Metal Tag on Gas-tank Material:PVC/PVC+Epoxy+Wave-absorbing material ... 3.5mm,50*35*3.5mm other sizes on requestsize of wave absorbing material:120*180mm Printing ... or pictures Working temperature:-25~+80 Applicationsteel cylinder,gas-tank,License plate,machine marking,tracking tools,identification ...