Loopilops Screen Protectors MJ 251 3-Pack NFC Stickers in Holo Blue on Gray (SAVE w/Larger 5, 10, & 20 packs) Tags are NTAG203 and are compatible w/ALL NFC Enabled Devices incl. Samsung HTC LG Moto Nexus Sony NFC Tags have about 137 bytes of usable memory - plenty for task launching apps. Tags are 30mm in diameter and made of tough PVC material with 3m Adhesive backing for easy placement anywhere. Works great with many 3rd Party NFC Android Apps.