NFC Forum Type 4 Tag The NFC Forum Type 4 Tag is the highest-end, most secure NFC tag defined by the NFC Forum. Feel free to contact us to order NFC tags of various capacities. The tag capacity can be customized (256~32K bytes), and the commonly used capacity is 1K, 2K, 4K, 8K, 16K, 32K bytes. We can assist customers …