When sourcing ID cards, you must prioritize material durability and chip technology. Standard cards typically use PVC (Polyvinyl Chloride), but for higher durability and heat resistance, PET or Polycarbonate (PC) is recommended. If the card requires smart functionality, specify the chip type such as LF (125kHz), HF (13.56MHz/NFC), or UHF (860-960MHz). Ensure the card thickness meets the ISO/IEC 7810 ID-1 standard (0.76mm or 30 mil) to guarantee compatibility with standard card printers and readers.