GoToTags On-Metal NFC Tag - Sticky Token - NTAG213 - Black - 30 mm with Hole - 10 Pack Includes 10 black NFC sticky tokens with the GoToTags NFC symbol 30 mm (1.18 in.) circle on-metal sticker tokens with a hole in the center and 3M adhesive backing Waterproof PVC housing protects the NFC chip and allows for outdoor use 144 usable bytes of data; suitable for a url, text, small contact record or single action phone trigger Compatible with all GoToTags software and NFC enabled phones