This spools is compatible for ZEBRA  GC, TLP, GK, GX printers  ( TLP 2844, TLP 2844-Z, TLP 3842, TLP 3844-Z, and Zebra G-Series models including GC420t, GK420t, GX420t, and GX430t printers.)

Zebra part number: 105903-053

Core Size 4.33" x 1/2"