many types in many use range 1 Specification MaterialPVC/ABS/PETGMaximum reading distance2-20cmSize:φ25mm,23mm,22mm.20mm,18mm,15mm.ChipTK4100,T5557,HitagS 256,HitagS 2048,Hitag 2Mifare 1 S50,Mifare 1 S70,Ultralight,I CODE SLI 2 Application:3 Machine 4 Certification Our workshop & machineOur Factory Contactless smart card/mifare ( Coin card)