RFID Labels, Zebra Z-Perform 1500T, Advanced, 3.819" x 1.063" (97mm x 27mm), Thermal Transfer, Permanent Adhesive, Not Perforated, Dogbone Inlay, 3" Core, 5" OD. 1000 Labels/Roll, 2 Roll Per Case, Priced Per Case. Compatible With ZD621R/ZD500R/RXi4/ZT400R/ZT600R