RFID Labels - Zebra PolyPro 4000D - General Purpose - 1.75" x 0.75" (44.5mm x 19.1mm) - Direct Thermal - Permanent Adhesive - Perforated - EOS-241 Inlay - 0.75" Core - 2.2" OD. 400 Labels/Roll - 12 Roll Per Case - Priced Per Case. Compatible With ZQ520R/ZQ630R.