The Phidget RFID - 30mm Disc Tag is a 125 KHz circular RFID Tag.
This plastic RFID tag has a robust design for factory or manufacturing use. It can be attached to anything using a screw or bolt though the hole in the center of the tag or stuck on with adhesive. The tag contains a unique ID that can be read by the 1023 – RFID reader at a distance of 11cm or less.
30mm Disk, 125 kHz, for use with the Phidget RFID Reader